Enabling processor compatibility with a script [Hyper-V]

When we released Windows Server 2008 R2 we added the ability to make a virtual machines processor more compatible for migration between different hardware platforms (details here).  Here is a PowerShell script to do this for you:

# Function for handling WMI jobs / return values
Function ProcessResult($result, $successString, $failureString)
   #Return success if the return value is "0"
   if ($result.ReturnValue -eq 0)
      {write-host $successString} 
   #If the return value is not "0" or "4096" then the operation failed
   ElseIf ($result.ReturnValue -ne 4096)
      {write-host $failureString "  Error value:" $result.ReturnValue}
      {#Get the job object
      #Provide updates if the jobstate is "3" (starting) or "4" (running)
      while ($job.JobState -eq 3 -or $job.JobState -eq 4)
         {write-host $job.PercentComplete "% complete"
          start-sleep 1
          #Refresh the job object
       #A jobstate of "7" means success
       if ($job.JobState -eq 7)
          {write-host $successString}
          {write-host $failureString
          write-host "ErrorCode:" $job.ErrorCode
          write-host "ErrorDescription" $job.ErrorDescription}
# Prompt for the Hyper-V Server to use
$HyperVServer = Read-Host "Specify the Hyper-V Server to use (enter '.' for the local computer)"
# Prompt for the virtual machine to use
$VMName = Read-Host "Specify the name of the virtual machine"
# Get the management service
$VMMS = gwmi -namespace root\virtualization Msvm_VirtualSystemManagementService -computername $HyperVServer
# Get the virtual machine object
$VM = gwmi MSVM_ComputerSystem -filter "ElementName='$VMName'" -namespace "root\virtualization" -computername $HyperVServer
# SettingType = 3 ensures that we do not get snapshots
$SystemSettingData = $VM.getRelated("Msvm_VirtualSystemSettingData") | where {$_.SettingType -eq 3}
# Get the processor setting data
$ProcSetting = $SystemSettingData.getRelated("Msvm_ProcessorSettingData") | select -first 1
# Enable processor compatibility
$ProcSetting.LimitProcessorFeatures = $true
# Apply the changes to the processor setting data back to the virtual machine
$result = $VMMS.ModifyVirtualSystemResources($VM, $ProcSetting.GetText(1))
# Process the result
ProcessResult $result "Enabled limited processor features." "Failed to enable limited processor features."