Windows 11 Pro 24H2 will not boot after enabling Hyper-V

Question

Just upgraded from Windows 11 Home to Pro. I want to enable Hyper-V on my PC. I have verified that it does support it via "msinfo32". My PC is a Dell Inspiron 5593, Intel Core i5 10th Gen with 16GB of memory.

After Hyper-V installs and reboots, my brand new upgrade will not boot. The only way to recover was to restore the PC which I did. Then tried Hyper-V again, same result. Have attempted to search Google for solutions without much success. There has to be a Microsoft process for resolving this issue.

Answer 1

In my case, there was a driver that caused Hyper-V to crash, only on Windows 11 after upgrading from 10. Solution:
First, remember the command to reset to boot safely from the Windows Recovery Environment: Troubleshoot > Advanced options > Command Prompt:

bcdedit /set {default} hypervisorlaunchtype off

Create a restore point / backup / recovery. Download a tool called Sysinternals Autoruns (https://learn.microsoft.com/de-de/sysinternals/downloads/autoruns)
Launch the tool as admin, go to the Drivers tab and disable all drivers in HKLM\System\CurrentControlSet\Services.
Set hypervisor to launch, by using:

bcdedit /set {default} hypervisorlaunchtype auto

If the machine boots successful and you can launch wsl, Docker, etc., you now can use binary search to find the culprit, by re-enabling more and more drivers.

In my case the driver was PxHlpa64 - Px Engine Device Driver for 64-bit (x86-64) Windows, which is known to cause issues.

Hope this helps

Answer 2

Is Microsoft going to fix this? Yes I have virtualization turned on in the Bios.
Yes System Info confirms it.
Sandbox used to work before 24H2 and with it enabled, caused Oct 2024 and subsequent updates to fail to install. Finally found that Sandbox feature being enabled was the reason why.