About 2 months ago, video games on my computer have suddenly started to periodically stutter. Normally, I run them fine, but now, about every 1 minute, the game starts to run at approx. 5 FPS for about a minute, then it reverts back to normal performance.
This happen to ALL video games on my computer, including browser flash games, strangely enough. However, video such as Twitch or YouTube still works fine. I should also note that sound still works find while stuttering, and is not affected by the lag.
I suspect this may have something to do with the GPU (GeForce 9500 GT, in my case), judging from the above symptoms, but I'm not certain. I have tried updating the video card drivers, but that didn't help. Any help with this issue would be greatly appreciated.