PC Freeze and Shutdowns with warning of Hyper-V-Hypervisor, ID 167 a few seconds before rebooting.

Question

While playing a game mostly it suddenly turns off screen but sound still can hear game is going on few second later sound also lags and continuously peep sound. So, i reboot system forcedly by pressing reboot button.

I checked Event Viewer the only mistake it shows is this:

The hypervisor did not enable mitigations for side channel vulnerabilities for virtual machines because HyperThreading is enabled. To enable mitigations for virtual machines, disable HyperThreading.

Event ID: 167

Even reinstalling OS helping for some weeks or max month.

What the reason? Can somebody help with that?

PC configuration:

OS: Windows 11 Pro

CPU: i7-11700 @ 2.50GHz

Mother B: Z590 Phantom gaming 4

RAM: DDR4 32GB 3600mhz

GPU: RTX 3080 10GB

NVMe: 2TB WD

Answer 1

Hello, Furik_DD

Welcome to the Microsoft Community.

Thank you very much for your feedback. I have carefully read the information and problem description you provided.

I understand that this problem is causing you trouble. According to the error you provided, the cause of this problem seems to be:

According to the error message, the system has Hyper-Threading technology enabled, which causes the virtual machine monitor (Hyper-V) to not enable mitigations for side channel vulnerabilities. Hyper-Threading technology allows each physical core to behave as two logical cores, which may conflict with Hyper-V in some cases, especially when mitigations for side channel vulnerabilities are enabled. This problem may cause the system to freeze or crash under high load (such as when playing games).

Because turning off Hyper-Threading technology is difficult, I suggest you try to disable Hyper-V first. You can turn it off directly in Windows Optional Features. The detailed steps are as follows.

Press Win + S keys, enter Control Panel, and then click Open.

In Control Panel, click Programs, and then select Turn Windows features on or off. In the Windows Features window, find Hyper-V, uncheck it, and then click OK.

You will be prompted to restart your computer. Click Restart.

If the problem persists after disabling Hyper-V, I suggest you try the more complex method of disabling Hyper-Threading. However, please note that disabling it will have a significant impact on your CPU performance. Please confirm this before you disable it.

Since each motherboard manufacturer's BIOS settings are different, we cannot provide you with specific operation suggestions.

Here are the general steps. If you find that you cannot find the relevant settings in the BIOS, please consult your motherboard manual or go to the motherboard manufacturer's website for more detailed operation steps.

When you restart your computer, press the Del or F2 key to enter the BIOS setup (the specific key position may vary depending on the motherboard).

In the BIOS setup, look for the Hyper-Threading or Hyper-Threading option (usually under the Advanced or CPU Configuration menu).

Best regards

Brian - Microsoft Community Support Specialist