Windows 10: Why did my fps drop from 60+ to 5 after an unexpected update?

I was playing with my friends and my FPS was 60+. My screen went black and I couldn't turn off my computer so I just unplugged it. When I started my windows again it started to update itself? After the update my fps dropped all the way to 4. Everything else works smoothly, except the games. What's the reason? How can I fix it? I already tried dusting my computer and changing the HDMI-Cable. Also tried scanning the computer with antivirus and it didn't have any malfare.

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FPS in some games are being capped at 60 FPS.

I Uninstalled drivers and installed it again. My integrated gpu is getting over the 60 fps easily but I have fps drops. So it's second gpu's problem

 

game fps dropped

Hello, I can't think of any other reason why my fps on CSGO has dropped to like ~40%. All I did was update my windows 11 and then I noticed my fps dropped hard. Normally my fps in a crowded server would be at ~60 fps. But now my fps in a crowded server is at ~40 fps and the worst is ~20 fps

How do I go back to the old windows version? Can't find it on settings.

System Info:

i3 10th gen

rx 570 8gb

16gb ram 2666 mhz

***Moved from Xbox***

 

Sudden FPS drop/Stutter

Since 2 days ago, I just turned on my Computer, and it starting having issues while I was playing Witcher 3 (starts with decent fpsm and then very low fps, dropping to 35, then 20, and stopping at 12 or so, in a matter of seconds, in a matter of 1min of starting the game), also stuttering without any high demanding programs, randomly. I was playing at 45-60 fps, without any stutters or sudden fps drop. Have tried other games the issue persists. Even setup everything to low settings.
I have ran several tests with several tools, all seems normal, no sudden memory spikes, or temperature raising out of the ordinary, nothing that would indicate such an fps drop or stuttering.

MSI Afterburner

I also did the reset option on Windows10, completly cleaned out all my personal info from the windows partition.
So at this point, I am not sure if it is a software issue or a hardware issue.
Any suggestions are greatly appreciated.

Edit: I kept doing some tests to find out the issue. And this happened before and I was able to replicate it. Same thing happened as before, till I set it up to fullscreen, Alt+Tab from the game and then back to the game, FPS went up to 50 again, stable and good, dropped after a couple of seconds. After a bit it went to 2-5 fps, and I had to shutdown the game, because even the sound was getting messed up.

MSI Afterburner 2

In this image those ups and downs in the GPU usage are when the fps dropped really hard and the sound got messed up.