Windows 10: Sudden low fps and cpu usage in all games

A while ago I tried playing bg3 as always but I got sudden low fps drops that ive never had.Same with the other games, such as house flipper,ac etc.The cpu usage while running these games is around 10-25% and I have no other background apps that could effect that.I checked my drivers everything is fine.Tried reinstalling them but not luck.No viruses either nor malware.Did the /scannow command in cmd had founda corrupted file but repaired it and still I get around 1-12 fps.My laptop specs arerocessor AMD Ryzen 5 4600H with Radeon Graphics 3.00 GHzInstalled RAM 16.0 GBGPU NVIDIA Geforce GTX 16

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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.

 

Sudden drop in cpu usage while gaming

Update : It has gotten worse now I'm getting FPS drops and drop in cpu usage every 2 minutes

It's like the fps is stable at 60 fps for 2 minutes then suddenly drops to 5 fps the I open task manager to see what happened then the CPU usage of NFS Heat drops from 50% to 20% then climbs back to 50-70%

 

Sudden drop in cpu usage while gaming

So I'm trying to play NFS Heat, the game runs fine on about 60 fps for 10 minutes or so but then the fps suddenly drops to like 5-10 for a few seconds and then runs again normally. This happens every 5-10 minute while I'm trying to play. One thing I have noticed in task manager is that the game uses around 70% of CPU and then the game's fps drops and the CPU usage drops to 10% then it rises again to 70-80% then again suddenly drops to 10% and the game's fps also drops. I don't what's the reason for this.

My Specs :-

16 GB DDR4 ram 3200 Mhz

AMD Ryzen 5 5500u

Nvidia GTX 1650 GDDR 5 4 GB

Thank you for taking your time and reading this. (Don't mind my english, not my native)