Screen display flashes or blinks if Device Guard or Credential Guard with Hyper-V has been enabled

When you enable Device Guard or Credential Guard with Hyper-V on your system, your screen will blink every X seconds. This is a really annoying bug and has been fixed by Intel.

Solution:

Upgrade your Intel(R) HD Graphics driver to version 20.19.15.4352.

Enable Hyper-V during Task Sequence in SCCM 2012 R2

Because I wanted to configure Device Guard with Windows 10, I need the Hyper-V Hypervisor to be enabled on Windows 10. I tried to do this with DISM and an answer file, but it’s not possible to enable Hyper-V during the Task Sequence Deployment because Hyper-V requires a couple of reboots.

Solution:

Create a new “Set Task Sequence Variable” task in your Task Sequence. This will run the PowerShell command after the Task Sequence ends. I’ve set this task before enabling the Driver Package, but it should be possible to place this task anywhere you like.

Task Sequence Variable: SMSTSPostAction

Value: powershell -ExecutionPolicy ByPass -Command “Enable-WindowsOptionalFeature -Online -FeatureName Microsoft-Hyper-V-Hypervisor -all -NoRestart;Disable-WindowsOptionalFeature -Online -FeatureName Microsoft-Hyper-V-Tools-All,Microsoft-Hyper-V-Services -NoRestart”

This will do the following:

  1. Enable all the Hyper-V Features after the deployment
  2. Remove the Hyper-V Tools and Services (Management Tools) afterwards. I found out that this is the best way to only add the Hyper-V Hypervisor.

You still need to reboot the system a few times to enable this feature. Because I enabled the BitLocker PIN, I can’t reboot the machine because it will ask for a PIN a few times.

Screenshot:

Enable-HyperV