Take a screenshot of a Hyper-V virtual machine guest using WMI and Invoke-CimMethod

Using the CIM cmdlets it's possible to take a screenshot of a virtual machine with the GetVirtualSystemThumbnailImage method. 

This needs to be run on the Hyper-V host as a user with Administrator rights.


$managementService = Get-CimInstance -Namespace "root\virtualization\v2" -ClassName "Msvm_VirtualSystemManagementService";

$vm = Get-CimInstance -Namespace "root\virtualization\v2" -ClassName "Msvm_ComputerSystem" -Filter "Name='$VirtualMachineIdentifier'";

$videoHead = Get-CimAssociatedInstance -ResultClassName "Msvm_VideoHead" -InputObject $vm;

$xResolution = $videoHead.CurrentHorizontalResolution;

$yResolution = $videoHead.CurrentVerticalResolution;

$result = Invoke-CimMethod -MethodName "GetVirtualSystemThumbnailImage" -InputObject $managementService -Arguments @{ TargetSystem = $vm; WidthPixels = $xResolution; HeightPixels = $yResolution };


The data returned then needs to be turned into a bitmap image.

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