Windows 10: CPU Jumps to 100% Usage and Closes Programs Because of it

This is a strange one...

My CPU will jump to 100% usage when I open something like OneNote, Teams, Brave Browser, and certain games, upon reaching 100% usage it will force close them and it refuses to allow me to open them at all.

Now, here's where it gets weird, I can use Chrome but I can't use Edge, or Brave, it just closes them immediately after opening them. I can use Word but not OneNote.

Finally the weirdest part, I CAN PLAY STEAM GAMES BUT NOT ANYTHING ELSE, what is wrong? I can play any game that I have on steam but if its on a different launcher it will immediately close it before it even opens fully. The CPU will still run at 90% when playing them but frames don't drop and it runs smooth.


Alright, here's where its downright confusing.

Sometimes, it works completely fine, no spikes, everything opens and works fine, no spikes, no frame drops, and nothing crashes. This issue only occurs when I power off the computer fully or restart it for an update, this issue also only started after a windows update that came about 2 weeks ago.

I have no clue what happened or if it was something I did. I generally know a good amount about computers, at least at a hardware level, but software is just not my thing.


Is there anything I can try to fix this issue?


i5-9400k

16g DDR4 3600mh

GTX 1660 Super

:)

 

Windows 10 CPU Usage 100%

Hi!

I have been having problems with my CPU usage. It's always 100%, but nothing is running in the background. When I open Task Manager, the percentages jump up and down really weirdly. Once there is Task Manager using 70% of CPU, one second later it goes back
down... Then comes like Discord on the top with again 50% CPU usage and again sec later it jumps back down... like It's constantly doing this with different programs like: System, System Interrupts, Chrome, Desktop Windows Manager...

 

100% cpu usage windows 10

 

cpu usage at 100%

CPU usage at 100% from start up for no apparently good reason. Service Host appears to be the problem but I cant narrow it down more than that at present.

Any suggestions?

I am using Windows 10 full release version 64 bit.