All my games used to run fine with no problem. However recently most of my games experience a frame rate drop from 30-60 fps down to 1-5 fps. This drop lasts anywhere from 30 seconds to over a minute and then I can around 5-20 minutes of uninterrupted gameplay.
GTA tells me that me video card is not being overworked and task manager tells me that my computer isn't being overworked either.
I have defragmented, dusted my computer, updated drivers, and deleted things off my computer with no luck for anything.
Games that lag include :Left 4 Dead 2, GTA IV, Minecraft. Games that don't include League of Legends.
Video Card is NVIDIA GeGorce 9500 GT with approx 2,797 MB of memory.
Only thing that I notice that would be out of place is that my current display is 32 bit but I have Vista 64 bit.