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Autorun

HKLM\SYSTEM\CurrentControlSet\Services\Cdrom

Data type

Range

Default value

REG_DWORD

0 | 1

1

Description

Determines whether the system sends a Media Change Notification (MCN) message to the Windows interface when it detects that a CD-ROM is inserted in the drive. The MCN message triggers media-related features, such as Autoplay.

If the MCN message is disabled, the media features that use it do not operate.

Value

Meaning

0

Does not send an MCN message.

1

Sends an MCN message.

Change method

To change the value of this entry, use Device Manager.

Activation method

To make a change to this entry effective, you must restart Windows 2000.

Note

If the value of this entry is 0, Autoplay does not operate, regardless of the value of the NoDriveAutoRun entry (in HKLM and HKCU) and the NoDriveTypeAutoRun entry (in HKLM and HKCU).

Tip

To disable Autoplay on particular drives, use NoDriveAutoRun (in HKLM or HKCU) or NoDriveTypeAutoRun (in HKLM or HKCU). Do not disable the Media Change Notification message unless you have no alternative.

Related Entries

AutoRunAlwaysDisable

NoDriveAutoRun (in HKLM)

NoDriveAutoRun (in HKCU)

NoDriveTypeAutoRun (in HKLM)

NoDriveTypeAutoRun (in HKCU)

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