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Windows 11 bug. Process uses 100% of the CPU

Anonymous
2021-10-09T22:38:49+00:00

I just installed windows 11, and suddenly I'm getting the following problem:

After about 11 minutes without using the computer a process called "AddInProcess" uses 100% of my CPU and as soon as i move the mouse, or click a key on the keyboard that process disappears and the CPU usage goes back to normal:

That process is the following:

and it's located in C:\Windows\Microsoft.NET\Framework64\v4.0.30319

I can't find a way to uninstall .NET Framework 4:

  • it doesn't appear in the "programs and features" list
  • it doesn't appear in the "programs" option of the control panel
  • it doesn't appear in the "installed update" list.
  • I tried this tool: Uninstall Tool - .NET | Microsoft Docs but i can't seem to find the right version to type in the powershell

I will try to reset the computer and install windows 11 again, I hope I won't get this problem anymore, but in case it will happen, how do you fix it?

My setup is:

  • CPU: Ryzen 5 3600
  • RAM: Corsair Vengeance LPX 2x8GB 3600MHz
  • Secondary memory: Samsung 970 EVO Plus SSD 500GB M.2 NVMe
  • GPU: R9 270x
  • Motherboard: MSI b550-a pro

All the drivers are updated, and I got the latest BIOS (version 7C56vA84 with windows 11 support)

Edit:
I've tried literally everything, fresh installed windows 3+ times, installed .NET framework fixes, ran windows in safe mode etc etc etc. At the end I contacted the Microsoft support team and they remotely controlled my computer. They couldn't fix it as well and said that it's a bug that will probably be fixed in the future. I will try to install it again soon and see what happens. I will update this question again when windows 11 will get a few major updates.

Edit2: I tried again, with windows 22H2 build 22621.2134 everything works fine. I'm not sure what the problem was

Windows for home | Windows 11 | Performance and system failures

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  1. Anonymous
    2022-01-13T22:50:40+00:00

    Hi guys I was able to solve my issue, by going to the power option and resetting it to default.

    I had also tried to lower the CPU usage option to 70% (to a lower percentage than 100).

    Any of these two steps helped me solve my problem.

    If the above steps do not solve your problem then do check the task manager for some random processes running in the background which causes the PC to slow down.

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  2. Anonymous
    2021-12-27T16:52:02+00:00

    Same issue here... cpu always at 100%. I have been using windows 11 for a long time (beta)

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  3. Anonymous
    2021-12-23T03:18:52+00:00

    The same issue happens with me. My pc gets freeze all of a sudden. CPU usage reach to 100% and I can't even move cursor.

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  4. Anonymous
    2022-02-05T04:45:54+00:00

    the solution is to wait 5 years or more until the error is solved I have a celeron n400 at 1.10ghz and I almost always have it at 80 70 90 and 100

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  5. Anonymous
    2022-01-14T09:19:15+00:00

    Thanks for the reply! I rolled back to windows 10 so i can't give it a try right now, but I remember that I tried to play around with the power options and it didn't fix the problem for me. I think it has something to do with the CPU.. The user above has a ryzen 5 as well, what CPU are you using?

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