Cmdlets

Choose a cmdlet from the list on the left or search for a specific cmdlet. Choose a cmdlet from the list or search for a specific cmdlet.
About Help  Providers
 

Update-MpSignature

Update-MpSignature

msft_mpcomputerstatus.cdxml, msft_mppreference.cdxml, msft_mpscan.cdxml, msft_mpsignature.cdxml, msft_mpthreat.cdxml, msft_mpthreatcatalog.cdxml, msft_mpthreatdetection.cdxml

Synopsis

Updates the antimalware definitions on a computer.

Syntax

Update-MpSignature [-CimSession] [-InformationAction] [-InformationVariable] [-ThrottleLimit] [-UpdateSource] [<CommonParameters>]

Detailed Description

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

Parameters

-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.

Aliases

Session

Required?

false

Position

named

Default value

none

Accept pipeline input?

false

Accept wildcard characters?

false

-InformationAction <System.Management.Automation.ActionPreference>

Aliases

infa

Required?

false

Position

named

Default value

none

Accept pipeline input?

false

Accept wildcard characters?

false

-InformationVariable <System.String>

Aliases

iv

Required?

false

Position

named

Default value

none

Accept pipeline input?

false

Accept wildcard characters?

false

-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.

Aliases

none

Required?

false

Position

named

Default value

none

Accept pipeline input?

false

Accept wildcard characters?

false

-UpdateSource <UpdateSource>

Specifies an update source. This 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.

Aliases

none

Required?

false

Position

named

Default value

none

Accept pipeline input?

false

Accept wildcard characters?

false

Input Type


Return Type


Notes

None

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

Online Version