Update-MpSignature

Update-MpSignature

Updates the antimalware definitions on a computer.

Syntax

Parameter Set: Update0
Update-MpSignature [-AsJob] [-CimSession <CimSession[]> ] [-ThrottleLimit <Int32> ] [-UpdateSource <UpdateSource> ] [ <CommonParameters>]

Detailed Description

The Update-MpSignature cmdlet updates the antimalware definitions with the latest definitions available on an update server.

Parameters

-AsJob

-CimSession<CimSession[]>

Runs the cmdlet in a remote session or on a remote computer. Enter a computer name or a session object, such as the output of a New-CimSession or Get-CimSession cmdlet. The default is the current session on the local computer.

-ThrottleLimit<Int32>

Specifies the maximum number of concurrent operations that can be established to run the cmdlet. If this parameter is omitted or a value of 0 is entered, then Windows PowerShell® calculates an optimum throttle limit for the cmdlet based on the number of CIM cmdlets that are running on the computer. The throttle limit applies only to the current cmdlet, not to the session or to the computer.

-UpdateSource<UpdateSource>

Specifies an update source. The cmdlet downloads updated definitions from the server you specify. If you do not specify this parameter, the cmdlet uses the Microsoft Update Server, then Microsoft Malware Protection Center (MMPC), as an update source. The acceptable values for this parameter are:

-- InternalDefinitionUpdateServer
-- MicrosoftUpdateServer
-- MMPC
-- FileShares

If you specify the InternalDefinitionUpdateServer setting, the service checks for updates on the Windows Software Update Services (WSUS) server.

<CommonParameters>

This cmdlet supports the common parameters: -Verbose, -Debug, -ErrorAction, -ErrorVariable, -OutBuffer, and -OutVariable. For more information, see    about_CommonParameters (https://go.microsoft.com/fwlink/p/?LinkID=113216).

Inputs

The input type is the type of the objects that you can pipe to the cmdlet.

Outputs

The output type is the type of the objects that the cmdlet emits.

Examples

Example 1: Update signatures

This command updates the antimalware definitions. By default, the cmdlet uses the default update source.

PS C:\> Update-MpSignature

Example 2: Update signatures from a specific source

This command updates the antimalware definitions from the Microsoft Update Server.

PS C:\> Update-MpSignature -UpdateSource MicrosoftUpdateServer