CPU Usage Above Normal

Merlinsclaw

Prominent
Mar 1, 2017
6
0
510
Hello, recently my CPU (I7-4790K) has been hitting 90% CPU usage while playing games or watching Youtube videos,
Ex: CSGO usually runs at around 270 FPS, however it's been at 60 FPS and has been stuttering.)

The problem arose when I did two things:
Installed MSI afterburner (Uninstalled now.)
And opened up my CPU fan to clean it.

I also however which may have contributed to the problem, applied thermal paste without properly cleaning the old thermal paste off of the processor. This was about a month ago.

If I could get some assistance that would be great.