[SOLVED] PC is running slow out of nowhere

[nathanyalross]

I am running a:
GTX 1660
i5-7400
16 GB DDR4 RAM

All of my components are fairly new, and my computer was working perfectly fine until I updated the driver for my old graphics card (1060) and everything started running slowly. Even the easiest games to run refuse to work (Fortnite won't render in models, when I get into combat in Fallout New Vegas my frames drop off a cliff). I've tried resetting my system, changing my OS to an SSD, and getting a new card but nothing is working. My GPU and CPU are both around 20-30 percent usage constantly, and I don't know how to even start to fix this.

 

[Mooons]

How are the temps? Are they thermal throttling?

 

[nathanyalross]

I just checked, and my CPU is running very hot (100 C). My fans are fine, but how should I fix this?

 

[Mooons]

Oh that’s most likely why. 100c is way to hot and Could damage your CPU over time.

Reapply thermal paste and clean the fans. See if that helps.