Really strange FPS drop's happening across all games - please help!

Jwoodall

Distinguished
Nov 16, 2009
31
0
18,530
Hi, so I recently defragged the harddrive and ran malwarebytes on my pretty ancient PC and found a great little performance boost. I was running overwatch at 60-70 fps at medium whereas previously to the defrag + malware scan I was running at around 45 on absolutely minimum everything. I installed BF4 last night to give it another crack and went to play this morning and it just wouldnt run, went back onto overwatch and it was running at around 3 fps, couldnt do a thing. I defragged again but to no change, then i restarted the PC and it ran fine. I started up another game on overwatch and halfway through it went straight back to 3 FPS out of nowhere. I dont really know what to do next. I have monitored CPU temps with openhardware monitor as other threads have suggested with similar problems but doesnt seem to be rising above 40. What should I do next?