IT Consultant Everyday Notes

Just some problems/solutions storage

Category Archives: Hyper-V

Hyper-V: Automatic VM Activation keys

AVMA keys used to automatically activated VMs running on a Hyper-V host are available here:


Windows 10: Cannot connect to Hyper-V after upgrade to 1809

I upgraded my W10 machine to 1809 (just before the fiasco forcing MS to stop delivery). My documents are intact, but what I found – Hyper-V on the machine cannot be connected anymore.

When I started Hyper-V MMC it did not connect to the local machine automatically and when I tried to force it I received and error:

“An error occurred while attempting to connect to server “xxx”. Check that the Virtual Machine Management service is running and that you are authorized to connect to the server.”

After some googling I found a solution from Anders Hanson which worked for me:

1. Open “Window Security”

2. Open “App & Browser control”

3. Click “Exploit protection settings” at the bottom

4. Switch to “Program settings” tab

5. Press “+” sign to add an exact path to a file or locate “C:\WINDOWS\System32\vmcompute.exe” in the list and expand it

6. Click “Edit”

7. Scroll down to “Code flow guard (CFG)” and uncheck “Override system settings”

8. Start vmcompute from powershell “net start vmcompute”

here is the original trail

Hyper-V: Snapshot all VMs on a host

I am an MCT and sometimes need to prepare a class for training. Microsoft provides Hyper-V – based VMs for that and I need to use snapshots to be able safely recover VMs if a student will go too far Smile

Microsoft recommends to do it one by one from GUI.

I found PowerShell is much better: as soon as all VMs are ready I just run:

Get-VM | CheckPoint-VM –SnapshotName  StartingImage

That makes snapshots on all VMs and names them “StartingImage” (so I do not need to rename them Winking smile )

Looks like an easy thing, but save a lot of time.

Hyper-V 2008 R1: Best Practice

Server 2012: Hyper-V on Gigabyte P67X-3DR

I am updating my home Lab to Server 2012. As a part of upgrade one of my Hyper-V hosts got the new OS. As soon as I enabled Hyper-V role it rebooted and sit forever showing me nice new windows logo (no logon screen).


I found resolution here. USB3 controller should be disabled in BIOS. Hopefully Gigabyte will fix it in later BIOS updates.

From this forum it looks like Windows 8 with Hyper-V role is affected too!