what is wrong with my GPU after I reinstalled windows and NVIDIA Driver ?

Kresna113

Commendable
Nov 6, 2016
5
0
1,510
I have an ASUS X550JX with NVIDIA GTX 950M 2GB and a couple weeks ago my laptop got this adware and u can't find it, so I just refreshed my Windows 8.1 and reinstalled everything from ASUS and stuff... I also updated NVIDIA driver ! But strangely enough my GTA 4 lose some of it framerate than before I refreshed my windows ! Before it was 40fps and now its around 36-38fps ! What is wrong with it ?