Windows 10: Windows 11 100% CPU and then does not start

About once every week or two, I'll notice that my computer is running slow, then I'll notice that the taskbar is either not responding, frozen, or running very slow. I try to open the task manager and when I manage to open it, it tells me that the CPU usage is at 100%. Even if I wait a while, it's still the same and I end up restarting the PC, but when I do, it always takes me to the BIOS. In order for Windows to start, I have to remove the power cable and restart it. Again, it usually still doesn't work, I get to the login part and it freezes again. I have to restart several times until it fi

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Windows 11 High CPU Usage 100 % all the time

Thank you for the suggestion and for providing the link to the fix. I appreciate your effort in trying to assist me with this issue.

I've followed the steps outlined in the blog you shared, hoping it would alleviate the 100% CPU usage problem on my Windows 11 system. Unfortunately, despite trying the suggested fix, the issue persists. It seems like my situation might be a bit more complex or perhaps requires a different approach to resolve.

Nonetheless, I'm grateful for your input and willingness to help. If you or anyone else has any other suggestions or ideas, I'm more than willing to try them out. Thanks again for your support!

 

100% CPU Usage after Windows 10 upgrade

Hello Aaron,

Thank you for posting on Microsoft Community. We regret the inconvenience caused and will assist you in resolving the issue.

Most of the time, computers only use a small fraction of their CPU power. In fact, many computers use less than 5% of their CPU most of the time. When you open an application, play a video game, or encode media file, the CPU usage will rise or spike temporarily.
Once the CPU intensive process completes, the CPU usage should once again drop down to lower level. Most applications will not use up more than 50% of your CPU for an extended period of time. However, some programs and system processes can use up a large amount
of CPU without you even knowing it. This may happen if a program gets stuck in an infinite loop or encounters an unexpected error.

I suggest you to perform Safe mode and Clean boot procedures on the PC by following the steps below.

Step 1: I suggest you to boot your PC in Safe mode by following the steps from the link below and check if the issue is resolved.

Safe mode is a diagnostic mode that starts your computer with limited drivers necessary to run Windows. The words
Safe Mode appear at the corners of your monitor to identify which Windows mode you are using.

Expand the options to boot into Safe Mode:

http://windows.microsoft.com/en-in/windows-10/start-your-pc-in-safe-mode



Reboot the PC to exit from Safe mode.

To know more about Safe mode, following is an article on
Windows Startup Settings (including safe mode) (Applies to Windows 10 also):

http://windows.microsoft.com/en-us/windows-8/windows-startup-settings-safe-mode

Step 2: If the issue persists, perform Clean boot on your PC by following the steps from the link below and check if the issue is resolved.

Putting your system in Clean Boot state helps in identifying if any third party applications or startup items are causing the issue.

I suggest you to perform clean boot by following the steps from the link below and check if the issue is resolved.

You can open the system configuration window in Windows 10:

a. Using run command.

• • Press Windows Key + R keys on the Keyboard.
  • Type msconfig.msc and press Enter.

b. Using Cortana.

• • Press Windows icon key on the keyboard and type msconfig.
    
  • Select the top most search result.
    

Follow the steps from 3 under How to perform a clean boot
for Windows 8.1 and Windows 8 from the link below (The steps for clean boot suggested in the link below for
Windows 8/8.1 is applicable for Windows 10 as well):

https://support.microsoft.com/en-us/kb/929135

Disclaimer: Start the computer in normal mode refer the section,
How to reset the computer to start normally after clean boot troubleshooting
from the link above.

Write to us with the status of the issue on the same post for further assistance. Your reply is most important for us to ensure we assist you accordingly.

Thank you.

 

Windows 11 - 100% CPU usage

Thanks for the suggestion regarding using Clean Boot to solve the problem.

I've done this and have confirmed no other apps are running, including removing virus protection.

The system is still running at 100% CPU.

Any other suggestions or things to check?

Thank you!