[SOLVED] Getting 100% spikes on one core, making games stutter (i9-9900KF CPU)

[Sokkehoved]

Hello
Starting a week or two ago (Atleast thats when I noticed it), I have begun to get huge stutters / lag spikes in my FPS games.
What I have seen / figured out so far is that out of the 16 core on my CPU, one (nr 15) looks like the only one thats really being used and spikes on 100% alot and thats when the stutter / lag happens in the games.
I have tried Hunt Showdown, 7 Days to Die and Colony Survival, where its the same that happens with all of them. They have normaly been running without any problems.
I dont have any troubles with League of Legends and Pheonix Point, the only thing I get there is that if I run youtube in the background to listen to something it lags from time to time.
Im not that much of a techi, so I have tried a few things that I could find on the net and also lower graphics in the games, but nothing have helped.

Specs:
i9-9900KF CPU
32GB Ram (4x Corsair Vengeance 8GB 2666Mhz
ASUS Turbo RTX 2070 Super 8G Evo x2
ASUS ROG STRIX Z390-F
KINGSTON A2000 M2 2280 NVMe 1TB
Corsair RM1000i Gold

This is how it looks like in 7 Days to Die with the lowest settings:

View: https://www.youtube.com/watch?v=T0uaAY8ji78


I hope Its enough info.

 

[TommyTwoTone66]

Likely you have some virus or unwanted background task running. Reinstall windows and see if the issue is still there.