I've been playing Team Fortress 2 and Left 4 Dead 2 lately, and they have been slower than usual. It stutters quite a bit, especially during the more hectic moments in game. Then I noticed using my computer in general seems slow. Like when I click around between programs. I also reformatted a couple of days ago because of the slowness. So I guess that didn't help. I'm wondeirng if my cpu is dying. I've had the part for about 5 years now.
Here's my specs...
Microsoft Windows XP Professional
Intel(R) Core(TM)2 Duo CPU E6750 @ 2.66GHz
2 GB DDR 2 RAM
Radeon HD 7770 video card