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Windows Media Player

Published: December 27, 2004

This section provides information about the following:

  • The benefits of Microsoft Windows Media® Player

  • How Windows Media Player communicates with sites on the Internet

  • How to control Windows Media Player to limit the flow of information to and from the Internet

This section describes the version of Windows Media Player that is included with Windows XP Professional with SP1. Other versions of Windows Media Player might differ from the version described in this section. For more information, see the Windows Media Web site at:

http://www.microsoft.com/Windows/WindowsMedia/

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On This Page

Benefits and Purposes of Windows Media Player
Overview: Using Windows Media Player in a Managed Environment
How Windows Media Player Communicates with Sites on the Internet
Controlling Windows Media Player to Limit the Flow of Information to and from the Internet
Procedures for Configuration of Windows Media Player

Benefits and Purposes of Windows Media Player

Microsoft Windows Media Player (also called the Player) enables users to play and organize digital media files on their computers and on the Internet. Users can listen to radio stations, search for and organize digital media files, and (with the necessary hardware) play CDs and DVDs, create custom CDs, and copy files to a portable device.

With Windows Media Player for Microsoft Windows XP Professional Service Pack 1 (SP1), you can configure the Player to control access to certain consumer features. The management and deployment features enable you to bring customized media functionality to your organization’s employees to enhance productivity.

It is beyond the scope of this white paper to describe all aspects of maintaining appropriate levels of security in an organization where users connect to sites on the Internet or download items from the Internet. This section, however, provides information about Windows Media Player that can help you to balance your organization’s requirements for communication across the Internet with your organization’s requirements for protection of networked assets.

For more information about deploying and managing Windows Media Player in an enterprise environment, see links on the Windows Media Web site at:

http://www.microsoft.com/Windows/WindowsMedia/

Overview: Using Windows Media Player in a Managed Environment

Windows Media Player is an integral component of Windows XP. Windows Media Player is not an optional Windows component and cannot be uninstalled. You can, however, use an answer file to hide entry points to the user interface. You can also customize the Player to make certain aspects of it either available, for limited use, or unavailable to the user in accordance with policies in your organization.

There are a variety of options available to you when considering how you want your users to interact with Windows Media Player. To help you assess what level of control to apply to your organization, the following table summarizes some of the configuration options.

Options for Controlling Communication with the Internet Through Windows Media Player

Options

Degree of Control

No access to Windows Media Player: Control users’ ability to see Windows Media Player icons and start Wmplayer.exe. For more information, see "Procedures for Configuration of Windows Media Player," later in this section.

Least access to media content (and no access to the Internet through Windows Media Player), but least flexible. With this option, users can be prevented from starting the Player.

Allow access only to specific Internet sites: Allow users to use Windows Media Player, but with access to only those Internet sites that are approved for access by an organization’s policies. Use an inclusion list (through the firewall or proxy or both).

Restricted access to Internet, but requires knowledge of which external sites are trustworthy.

Allow Internet access only to selected users: By restricting Internet access to selected users, restrict communication between Windows Media Player and Internet sites. For example, place most users on a network with a firewall that blocks Internet access.

Access to Internet only available to users who need it most. Implies that training is provided to selected users, who are held accountable.

Limit the Windows Media Player features that can be used: Allow users to use Windows Media Player, but with access to only certain features.

Use Group Policy settings to configure Windows Media Player on clients. To do this, you might need to update the appropriate Administrative template, Wmplayer.adm, to a version that contains the settings for Windows XP with SP1. For more information, see "Controlling Windows Media Player to Limit the Flow of Information to and from the Internet" and "Procedures for Configuration of Windows Media Player," later in this section. Also, see Appendix B, “Learning About Group Policy and Updating Administrative Templates.”

Moderate control and moderate flexibility. With this option, the user has access to the Player, but you maintain control over which options they are able to use.

Free access: Allow free access for all.

Highest access to the Internet and media content.

The following subsections describe how Windows Media Player communicates with the Internet and how to control the flow of information to and from the Internet. They also give procedures for using Group Policy to control the user interface, playback, and networking as well as procedures for using registry keys to control the Player updates.

How Windows Media Player Communicates with Sites on the Internet

The Windows Media Player interface opens locally when the user navigates through Start\Programs or Start\All Programs, or else clicks a shortcut on the desktop. When the user selects either Media Guide, Radio Tuner, or Skin Chooser/More Skins from the Player taskbar, Windows Media Player connects to www.WindowsMedia.com through either a local area network (LAN) or a modem connection.

Communication with the WindowsMedia.com Site

When a connection is made with the Internet, WindowsMedia.com provides the following key features.

  • Metadata retrieval

  • Metadata submission

  • Media guide

  • Radio tuner

  • Codec download

  • Player update

  • Newsletter signup

  • Downloadable skins

  • Downloadable visualizations

Communication with Other Sites

WindowsMedia.com is a Web site operated by Microsoft and is tightly integrated into Windows Media Player. Media Guide and Radio Tuner are Web pages provided by WindowsMedia.com. All of the CD audio data, DVD data, radio presets, and information in the Info Center View pane of the Now Playing feature also come directly from WindowsMedia.com. Other services provided by WindowsMedia.com include the Player updates and download support for codecs, skins, and visualizations. (A codec—compressor/decompressor—is software that compresses or decompresses audio or video data.)

To support the playback of secure content, Windows Media Player will also contact:

  • Non-Microsoft digital rights management (DRM) license servers

  • Microsoft DRM upgrade service

The other common Internet connections that Windows Media Player makes are to media servers that are run by content providers.

Data Exchanged During Communication with the Internet

The following subsections describe various aspects of the data that is sent to and from the Internet through Windows Media Player, and how the exchange of information takes place:

  • Information Sent or Received When Specific Features Are Used

  • Default Settings and Triggers

  • Logging, Encryption, Identification of User, and Privacy

  • Transmission Protocols and Ports

  • Enabling and Disabling Features

Information Sent or Received When Specific Features Are Used

When a user uses one of the features of the Player listed previously, information is sent to or from the Internet as follows:

  • Non-Microsoft digital rights management (DRM) license servers. When users try to play back content protected with Microsoft DRM technology, the Player will try to acquire a license for the content from a license server. The license acquisition process might also update the user's DRM revocation and exclusion lists. These lists are used to block compromised applications from accessing secure content.

  • Microsoft DRM upgrade service. The upgrade service provides users with the option to upgrade their DRM components in case the secure content that they want to play requires an upgraded component that supports the higher level of security.

  • Media servers run by content providers. To provide streaming media, it is necessary for Windows Media Player to communicate directly with a media server. These servers are typically operated by non-Microsoft content providers, and are not under Microsoft control.

  • Metadata retrieval. When the user triggers a metadata request (see the bulleted item, "Triggers and user notifications" in “Default Settings and Triggers,” later in this section), a CD table of contents or DVD identification is sent from the user's computer, and then metadata is retrieved. The metadata can include album art, track names, lyrics, and even artist biographical information. The metadata is stored in the user's media library for offline use.

  • Metadata submission. This is a service that enables users to submit corrections to the WindowsMedia.com metadata database. A cookie on the client is accessed by WindowsMedia.com (unless the cookie is blocked). The CD table of contents or DVD identification and the user's corrected metadata are sent to WindowsMedia.com.

  • Media guide. Media Guide is a set of Web pages, hosted within the Windows Media Player interface, that focuses on streaming media. A cookie on the client is accessed by WindowsMedia.com (unless the cookie is blocked) and WindowsMedia.com sends the Media Guide Web page.

  • Radio tuner. Radio Tuner is a set of Web pages, hosted within the Windows Media Player interface, that focuses on Internet radio stations. A cookie on the client is accessed by WindowsMedia.com (unless the cookie is blocked) and WindowsMedia.com sends the Radio Tuner Web page, with presets (if the cookie is not blocked).

  • Codec download. This service enables users to acquire certain codecs during playback if they are not resident on the user's system. A codec identifier is sent to codecs.microsoft.com. A codec is downloaded and installed if available.

  • Player update. This service enables a user to learn about and acquire updated Windows Media Player components, but only if the user is logged on as an administrator. The version number and the language of the installed Player (for example, English) are sent to autoupdate.windowsmedia.com. Information about available updates is returned and the user can accept or decline the updates.

  • Newsletter signup. The Media Guide provides a link to the Microsoft Network (MSN) newsletter service so that users can sign up for MSN Entertainment newsletters. A cookie on the client is accessed by the Microsoft Web site (unless the cookie is blocked). Any sign-up for MSN Entertainment newsletters is done through newsletters.msn.com.

  • Downloadable skins. In the Tools menu, under Download, Skins links to a Web page that contains extra downloadable skins. A cookie on the client is accessed by WindowsMedia.com (unless the cookie is blocked) and the Skins Web page is sent back in Internet Explorer.

  • Downloadable visualizations. In the Tools menu, under Download, Visualizations links to a Web page that contains extra downloadable visualizations. A cookie on the client is accessed by WindowsMedia.com (unless the cookie is blocked) and the Downloadable Visualizations Web page is sent back in Internet Explorer.

  • Media library. Media Library lists the user’s collection of audio and video files, as well as links to sources for audio and video. This information can be accessed by other software on the user’s computer and on the Internet.

  • Cookies. Windows Media Player uses the Internet as a networking and information source. When accessing the Internet, cookies may be downloaded to the user’s computer or uploaded to a media service.

  • Site logs. Servers that provide media content create two types of logs as follows:

    • Raw IIS log. On servers that provide media content, a standard Internet Information Services (IIS) log records all requests to the server. This log includes the IP address of the client and a cookie. It is not encrypted.

    • Tracking log. Servers that provide media content also have a tracking log that records all requests. It includes the IP address of the client and a cookie. The log is neither encrypted nor correlated with personally identifiable information.

The Player also generates a streaming media log and sends it to any media servers that exist on your network. For more information, see "Logging, Encryption, Identification of User, and Privacy," later in this section.

Default Settings and Triggers

The following list describes default settings in Windows Media Player, including the triggers that might initiate communication between Windows Media Player and the Internet.

  • Default settings: In the version of Windows Media Player included in Windows XP with SP1, the key features and options are enabled by default, as described in the list that follows.

  • Triggers and user notifications: The features that can initiate communication with the Internet are triggered individually by various user interactions as listed below. With some features, the user is presented with a Web page that is both a notification and a trigger, providing items for the user to click in order to complete a download. With other features, the user may or may not be notified at the time of the trigger, as described in this list.

    • Metadata retrieval

      Notification. The user is not notified.

      Trigger. When the user first inserts a CD or DVD, or when the user requests detailed information (for example, by using the Media Details button), information is retrieved automatically from WindowsMedia.com.

    • Metadata submission

      Notification. The user is notified.

      Trigger. When the user submits corrected metadata for files, CDs, and DVDs, information is sent to WindowsMedia.com.

    • Media guide

      Notification. The user is not notified.

      Trigger. The media guide is triggered automatically if the user selects the Start player in Media Guide check box on the Player tab in the Options dialog box, or when the user selects Media Guide from the taskbar.

    • Radio tuner

      Trigger and notification. When the user selects Radio Tuner from the taskbar, a page is triggered from which the user can search for or select radio stations.

    • Codec download

      Notification. There is no Windows Media Player pop-up message. If the site from which a codec is being downloaded is not a trusted site, a security dialog box will pop up. The Windows Media Player status bar will indicate that a codec is being downloaded.

      Trigger. The trigger occurs when a user tries to play media content requiring a codec that is not on the user’s computer.

    • Player update

      Notifications. The user is notified. The user is prompted to download, but can decline to do so.

      Trigger. At a set frequency (for example, weekly), if the user is online and is logged on as an administrator, a check is made for updated Windows Media Player components. This can be disabled through a registry setting.

    • Newsletter signup

      Trigger and notification. The user selects Subscribe to the Newsletter on the Media Guide. If a user fills in the Web page offering newsletter options and then clicks Subscribe, the user is signed up.

    • Downloadable skins

      Trigger and notification. Users select More skins from Skin Chooser on the taskbar, which brings up the Skins Web page. When users select a skin from this screen, the skin is downloaded.

    • Downloadable visualizations

      Trigger and notification. The user selects Download Visualizations from the Tools menu, which brings up the Visualizations Web page. When the user selects a visualization from this page, they are prompted to accept or reject the download. If the user accepts, the visualization is downloaded.

    • Media library

      Trigger and notification. The trigger occurs when the user adds purchased media to the library from WindowsMedia.com or another media vendor. Access can be turned off through the Media Library tab in Tools\Options.

    • Cookies

      Notification. The way that Windows Media Player handles cookies sent from a Web site depends on privacy settings that affect Internet Explorer, Outlook Express, Windows Media Player, and any other programs that rely on these settings. These settings control whether cookies are allowed, cookies are blocked, or the user is prompted before a cookie is allowed. The settings are controlled through the Internet Explorer component.

      Trigger. The trigger occurs automatically when a Web site is accessed.

Logging, Encryption, Identification of User, and Privacy

The following list describes the way the Player sends logging information to a streaming media server, the encryption options available for the Player, the fact that the Player does not uniquely identify the user, and the privacy statements related to the Player.

  • Logging: Logging occurs when information is sent from the Player to a streaming media server. Logging can also occur when information is sent from the Player to a program on a Web server, if the program is designed to create log entries. For more information about logging, refer to the white paper, "Logging Model for Windows Media Services 9 Series," on the Microsoft Web site at:

    http://go.microsoft.com/fwlink/?LinkId=29867

    Logging informs the server of various pieces of information so that services can be improved. The information includes such details as connection time and the Internet protocol (IP) address of the computer that is connected to the server—typically a Network Address Translation (NAT) or proxy server. This information also includes the version, identification number (ID), date, and protocol of Windows Media Player. Most information is neither unique nor traceable to the user’s computer. For more detailed information about the exchange of information in Windows Media Player, see the following bulleted item, "Privacy.”

  • Encryption: Windows audio media can be encrypted using the Secure Audio Path feature in digital rights management (DRM). The Secure Audio Path feature maintains audio encryption beyond the Player application. Secure Audio Path is a feature of Microsoft Windows that maintains the security and protection of digital music that has been encrypted by using DRM technology. Secure Audio Path provides an infrastructure for maintaining copy protection on music.

    The client can also progressively download content from a Web server using HTTPS. A client and server may also use Internet Protocol security (IPSec) to encrypt packets that traverse the network.

  • Uniquely identify user: Windows Media Player at no time requests any personally identifiable information (such as name, address, or phone number).

  • Privacy: Windows Media Player and WindowsMedia.com both have published privacy statements that detail their data collection and use practices. These documents are available to users at the following locations:

Transmission Protocols and Ports

The following list describes the transmission protocols and ports used by the Player.

  • Transmission protocol: With Windows Media Player you can specify that selected protocols are used while receiving streaming media from a Microsoft Media Server (MMS) URL as described in the following list.

    By default, Windows Media Player interprets the media stream coming from the media server and tries User Datagram Protocol (UDP). If the Player is unable to connect through UDP (for example, if the Player is behind a firewall that does not allow UDP), the Player tries the Transmission Control Protocol (TCP). If the Player is unable to connect through TCP on the desired port, the Player tries HTTP. This protocol rollover takes place by moving from the most efficient protocol (UDP) to the least efficient protocol (HTTP), because not all firewalls have the necessary ports open to play Windows Media streams.

    • Multicast. Routers will not pass multicast streams across an intranet unless specifically configured to do so.

    • UDP. UDP is used with port selection if required due to firewall or proxy issues. If the UDP check box is selected and the UDP ports box is blank, the Player uses default ports when playing content from an MMS URL. If the UDP check box is not selected, the information in the UDP ports box is ignored. If using a network address translator (NAT), UDP will fail unless the NAT supports dynamic opening of ports through UPnP™.

    • TCP

    • HTTP. When the HTTP protocol is selected, the HTTP protocol is used to receive streaming media from an MMS URL. Streaming media from an MMS URL that requires the UDP or TCP protocols cannot be played.

    If none of the protocols is selected, content from an MMS URL cannot be played.

  • Port: The Windows Media Player client communicates across random ports as designated by the operating system. The server port is a "well-known port" as follows:

    • Transmission protocol and port: The transmission protocol is HTTP and the port is 80.

    • Microsoft Media Server (MMS) UDP or TCP: The port number is 1755.

    In a TCP connection, there is only one socket created. (A socket is an identifier for a particular service on a particular node on a network.) You therefore need only one port number on the client and one on the server. Commands (such as play, pause, and fast forward) and data (audio and video) are sent across the same socket connection. In UDP connections, however, the client makes a TCP connection to the server and sends commands over it. The server then opens a UDP socket to the client. It is over this second socket that the audio and video data is sent, and it is this second socket that firewalls and proxies typically block.

    The version of HTTP in use before July 1999 was HTTP/1.0, and the version in use since then is HTTP/1.1. In an HTTP streaming connection using HTTP/1.0, there is only one socket opened at a time. With HTTP/1.0, for each play, pause, stop, fast forward, or rewind operation, the original socket is closed, another socket is opened, and this second socket will more than likely use a different port number on the client. (There are other operations that use more than one socket.)

    If the enterprise network implements a firewall that prevents users from receiving streams that use the UDP or TCP protocols, Windows Media Player can be configured to work with firewalls as described in the following list items.

Windows Media and Firewalls

Windows Media normally streams through UDP/IP on a wide range of ports (these port numbers are provided later in this list). Aware of the possible security issues that a range this size can cause, Microsoft has also enabled Windows Media to stream with TCP/IP through a single port (1755). For those sites where opening a port that is not "well known" is a problem, Windows Media can also stream through HTTP on port 80. HTTP streaming from Windows Media Services is disabled by default. Some firewalls have a preconfigured NetShow Player (the former name for Windows Media Technologies) setting, which may work for Windows Media.

There are five primary scenarios to consider when you set up a firewall to accommodate Windows Media:

  • Using Windows Media Player behind a firewall to access content outside the firewall

  • Using Windows Media Player outside a firewall to access content on a media server behind the firewall

  • Using Windows Media Encoder outside a firewall to communicate with a media server behind the firewall, or to communicate between two servers across a firewall

  • Using Windows Media Administrator outside a firewall to manage a media server behind a firewall

  • IP multicast

This section of the white paper describes only the first and last scenarios—that is, the case of the client behind the firewall and the case of IP multicast. In the examples below, the in port is the port that the server uses to get past the firewall. The out port is the port that Microsoft Windows Media Player or other clients use to communicate with the server.

  • Client configuration behind a firewall

    A firewall configuration that enables users with Windows Media Player behind a firewall to access media servers outside the firewall is as follows:

    Streaming ASF with UDP
    Out: TCP on port 1755
    Out: UDP on ports 1755 and 5005
    In: UDP between ports 1024 and 5000 (As a security measure, estimate the number of ports that you will need by determining how many clients you expect, and open only that number of ports.)

    Streaming ASF with TCP
    In and out: TCP on port 1755

    Streaming ASF with HTTP
    In and out: TCP on port 80

  • IP multicast

    Choosing to allow Windows Media streaming through IP multicast is simply a choice to allow traffic that is addressed to the standard Class D IP addresses (224.0.0.0 through 239.255.255.255). As of this writing, most routers have IP multicast disabled. Router companies made a decision to have their equipment default to disable IP multicast at a time when a typical video stream took up 30 percent of a 10BaseT network. (10BaseT is the Ethernet standard for baseband local area networks.)

    Microsoft is working with major router vendors to reverse this situation, now that media streams are compressed and standards are in place that eliminate unwanted multicast traffic. The Internet Group Management Protocol (IGMP) supported by Windows Media assures that multicast traffic passes through the network only when a client has requested it. Windows Media streams are highly compressed, usually only taking up the bandwidth of a single modem connection.

    The following firewall configuration enables IP multicasting:

    Streaming ASF with multicast
    IP multicast address range: 224.0.0.1 through 239.255.255.255
    To enable IP multicasting, you must allow packets sent to this standard IP multicast address range to come through the firewall. This IP multicast address range must be enabled on both client and server sides, as well as on every router in between.

For more information about firewall settings for Windows Media, search for the latest information on the Windows Media Web site at:

http://www.microsoft.com/Windows/WindowsMedia/

You can also find information about firewall settings on the Windows Media Web site at:

http://go.microsoft.com/fwlink/?LinkId=29862

Enabling and Disabling Features

All key features in Windows Media Player are enabled by default. However, each can be disabled through Tools\Options in Windows Media Player, through the use of Group Policy, through changes to the registry settings, or through an answer file during unattended installation. For more information, see "Settings That Can Be Controlled Through Group Policy" and "Procedures for Configuration of Windows Media Player," later in this section.

Controlling Windows Media Player to Limit the Flow of Information to and from the Internet

If the Player is not widely used in your organization, you can remove all visible entry points to it by using the procedure described in the subsections that follow.

If Windows Media Player is being used in your organization, you can control individual features of the Player either through Tools\Options or through Group Policy. The recommended method for controlling the features in a managed environment is through Group Policy, with an additional change to the registry that will prevent the Player update. The following lists describe options that can be controlled through the Windows Media Player user interface, through Group Policy, and through other means. For more details about configuring these options, see  "Procedures for Configuration of Windows Media Player" later in this section.

Controlling Windows Media Player Through the User Interface

When users interact with Windows Media Player through the user interface, they can limit the flow of information to and from the Internet by following this list of practices.

  • Metadata retrieval. Avoid inserting a CD or DVD.

  • Metadata submission. Avoid submitting metadata.

  • Media guide. After clicking Tools\Options, on the Player tab, clear the Start Player in Media Guide check box.

  • Radio tuner. Use a custom skin with no Radio Tuner access.

  • Codec download. After clicking Tools\Options, on the Player tab, clear the Download codecs automatically check box.

  • Newsletter signup. Use a custom skin with no Media Guide access. Eliminating access to Media Guide eliminates access to the newsletter signup.

  • Downloadable skins. Use a custom skin that does not display downloadable skins.

  • Downloadable visualizations. Use a custom skin that does not display downloadable visualizations.

Settings That Can Be Controlled Through Group Policy

The following settings for Windows Media Player can be controlled through Group Policy. The policy settings for Windows Media Player in Windows XP with SP1 are located at User Configuration\Administrative Templates\Windows Components\Windows Media Player.

  • User Interface settings

    • Set and Lock Skin

      You can use a custom skin that eliminates access to functionality you want to control, specifically, Radio Tuner, Media Guide, display of downloadable skins, or display of downloadable visualizations.

    • Do Not Show Anchor

  • Playback setting

    • Prevent Codec Download

  • Networking settings

    • Hide Network Tab

      When you hide this tab, users cannot configure network settings for Windows Media Player.

    • Streaming Media Protocols

      The protocols to choose from are Multicast, UDP (enter UDP ports if required), TCP, and HTTP, as described in "How Windows Media Player Communicates with Sites on the Internet" earlier in this section.

    • Configure HTTP Proxy

      This Group Policy setting is ignored if the setting for Streaming Media Protocols is enabled and HTTP is not selected. When this Group Policy setting is disabled, the Player cannot use the HTTP proxy and the user cannot change the HTTP proxy settings on the Network tab in Windows Media Player.

    • Configure MMS Proxy

      This Group Policy setting is ignored if the setting for Streaming Media Protocols is enabled and multicast is not selected. When this policy setting is disabled, the MMS proxy cannot be used and the user cannot change the MMS proxy settings on the Network tab in Windows Media Player.

    • Configure Network Buffering

Other Ways to Control Windows Media Player

You can control several aspects of Windows Media Player by using methods other than the user interface or the individual Group Policy settings for Windows Media Player. These methods for controlling the Player include the following:

  • Prevent users from starting Windows Media Player through Group Policy by adding Wmplayer.exe to a list of Windows applications that cannot be run. This will prevent users from opening the Player by double-clicking media files or through other indirect methods. For more information, see "To Prevent Users from Starting Windows Media Player by Using Group Policy," later in this section.

  • Use Set Program Access and Defaults, which is available from the Start menu, to remove visible entry points to Windows Media Player. With this dialog box, the administrator of a computer running Windows XP Professional with SP1 can specify which media player is shown on the Start menu, desktop, and other locations.

  • Use the firewall or proxy or both to block access to the WindowsMedia.com Web site.

  • Use a registry key, "DisableAutoUpdate," to disable the automatic update feature in Windows Media Player. For more information, see "To Disable the Update Feature in Windows Media Player Using a Registry Key," later in this section.

  • Create custom player skins that contain only those features that you want users to use. For information about creating custom skins, see these MSDN Web sites:

Procedures for Configuration of Windows Media Player

Windows Media Player can be configured in several ways, as described previously. This subsection provides procedures for the following:

  • Locating Group Policy settings for configuring Windows Media Player

  • Preventing users from starting Windows Media Player by using Group Policy

  • Accessing the Player tab and the Network tab on the user interface in Windows Media Player (to control Internet options and set streaming media protocols)

  • Using a registry key to disable the automatic update feature in Windows Media Player

  • Removing visible entry points to Windows Media Player on a computer running Windows XP with SP1

  • Removing visible entry points to Windows Media Player during unattended installation by using an answer file

    Important To prevent users from manually updating Windows Media Player, we recommend that those users are not set up with administrative credentials on their computers.

To Locate Group Policy Settings for Configuring Windows Media Player

  1. See Appendix B, "Learning About Group Policy and Updating Administrative Templates,” for information about using Group Policy. Ensure that your Administrative templates have been updated, and then edit an appropriate GPO.

  2. In Group Policy, click User Configuration, click Administrative Templates, click Windows Components, and then click Windows Media Player.

  3. View the Group Policy settings that are available. For more information about these settings, see the list under "Settings That Can Be Controlled Through Group Policy," earlier in this section.

To Prevent Users from Starting Windows Media Player by Using Group Policy

  1. As needed, see Appendix B, "Learning About Group Policy and Updating Administrative Templates," and then edit an appropriate GPO.

  2. Click User Configuration, click Administrative Templates, and then click System.

  3. In the details pane, double-click Don’t run specified Windows applications.

  4. Select Enabled, click Show, click Add, and then type:

    Wmplayer.exe

Setting Options Including Streaming Media Protocols

The following procedures provide methods for setting specific options in the Player.

If you want to set streaming media protocols, there are two methods. One method, described in the following procedure, is to use the Network tab to both configure the protocols and proxy settings that you want Windows Media Player to use when receiving streaming media files, and to then hide the Network tab through the use of Group Policy in Windows Media Player. The second method is to use Group Policy directly. For more information about using Group Policy, see "To Locate Group Policy Settings for Configuring Windows Media Player" and "Settings That Can Be Controlled Through Group Policy," earlier in this section.

To Access the Player Tab and the Network Tab on the User Interface in Windows Media Player
  1. On the Tools menu, click Options, and then click the Player tab.

  2. Check or clear check boxes as needed. Some of the check boxes include:

    • Download codecs automatically.

    • Allow Internet sites to uniquely identify your Player.

      The Player is identified with a globally unique identifier (GUID).

    • Acquire licenses automatically.

    • Start Player in Media Guide.

  3. Click the Network tab.

  4. The following options are listed on the Network tab:

    • Protocols. Specifies the protocols that Windows Media Player can use to receive a stream. Select one or more of the following:

      Multicast

      UDP

      TCP

      HTTP

      By default, all protocols are selected, which means that the Player tries to use each protocol in turn until it finds one that succeeds. Because the Player can receive files using a variety of protocols, we recommend that you select all protocols.

    • Use ports. Specifies a port range if UDP is the protocol used to receive streaming content. This option is useful if your network or firewall administrator has established a specific port that enables streaming content to pass through. Unless otherwise instructed, Windows Media streams attempt to pass through firewalls on port 1755.

    • Proxy settings. Select one of the following:

      HTTP

      MMS

      Proxy settings specify how each protocol operates with a proxy server. Proxy servers are used when networks are protected by firewalls. If your network is behind a firewall, and you do not know how to configure your settings, refer to "Windows Media and Firewalls" in the list under "How Windows Media Player Communicates with Sites on the Internet,” earlier in this section.

    • Configure button. Click this button to change the proxy settings of the selected protocol. The following table lists the options for configuring a protocol to work with a proxy server.

Options for Configuring a Protocol to Work with a Proxy Server

This Option

Specifies That

Autodetect proxy settings

The Player discovers the ports that are open and uses them to receive streaming content.

Use proxy settings of the Web browser

The Player uses the same HTTP configuration as your browser to access network communication.

Do not use a proxy server

The Player does not attempt to communicate with a proxy server. Typically, this means that the Player does not receive streaming content from the Internet.

Use the following proxy server

The Player uses the proxy server and port that you specify. Select Bypass proxy server for local addresses if you do not want the Player to use the proxy server when streams are from local servers.

To Disable the Update Feature in Windows Media Player Using a Registry Key
  1. Close Windows Media Player (all instances).

  2. Open Registry Editor by clicking Start, clicking Run, and then typing regedit.

    Caution Incorrectly editing the registry may severely damage your system. Before making changes to the registry, you should back up any valued data on the computer. You can also use the Last Known Good Configuration startup option if you encounter problems after manual changes have been applied.

  3. Locate the following key in the registry: HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft

  4. On the Edit menu, point to New, click Key, and then type the following key name:

    WindowsMediaPlayer

  5. Select the key you just added and, on the Edit menu, point to New, and then click DWORD value.

  6. Type DisableAutoUpdate as the name for the new value (the type is REG_DWORD), and then press ENTER.

  7. Click DisableAutoUpdate, and then on the Edit menu, click Modify.

  8. For Value data, type:

    1

Windows Media Player has the ability to update codecs from the Internet regardless of whether the Player updates were disabled. However, you can control the updating of codecs through Group Policy, as described in “Settings That Can Be Controlled Through Group Policy” and “To Locate Group Policy Settings for Configuring Windows Media Player,” earlier in this section.

Removing Visible Entry Points to Windows Media Player

You can remove visible entry points to Windows Media Player on an individual computer running Windows XP with SP1, or you can remove them during unattended installation by using an answer file.

To Remove Visible Entry Points to Windows Media Player on a Computer Running Windows XP with SP1
  1. Click Start, and then either click Set Program Access and Defaults, or point to All Programs and then click Set Program Access and Defaults.

  2. Click the Custom button.

    Note Alternatively, you can click the Non-Microsoft button, which will not only remove visible entry points to Windows Media Player, but also to Internet Explorer, Outlook Express, and Windows Messenger. If you do this, skip the remaining steps of this procedure.

  3. To disable access to Windows Media Player on this computer, to the right of Windows Media Player, clear the check box for Enable access to this program.

  4. If you want a different default media player to be available to users of this computer, select the media player from the options available.

    Note For the last step, if your program does not appear by name, contact the vendor of that program for information about how to configure it as the default. Also, for related information about registry entries that are used to designate that a program is a browser, e-mail, media playback, or instant messaging program, see Registering Programs with Client Types on the MSDN Web site at:

    http://go.microsoft.com/fwlink/?LinkId=29306

For more information about Set Program Access and Defaults, see article 328326, “How to Use the Set Program Access and Defaults Feature in Windows XP Service Pack 1,” in the Microsoft Knowledge Base at:

http://go.microsoft.com/fwlink/?LinkId=29309

To Remove Visible Entry Points to Windows Media Player During Unattended Installation by Using an Answer File
  1. Using the methods you prefer for unattended installation or remote installation, create an answer file. For more information about unattended and remote installation, see Appendix A, "Resources for Learning About Automated Installation and Deployment."

  2. In the [Components] section of the answer file, include the following entry:

    WMPOCM = Off

For complete details about how the WMPOCM entry works, see the resources listed in Appendix A, "Resources for Learning About Automated Installation and Deployment." Be sure to review the information in the Deploy.chm file (whose location is provided in that appendix).

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