Clean? You mean update? What brand is your video card? What model is your video card? Why give us such rubbish, basic information? Why are you a worse speller than people who speak English as a 2nd language?
i spoke to him over MSN, he might have remnants of a previous gfx card driver, i reccomended he cleaned all of them off using the driver cleaner, then re-installed them
That sounds more like an overheating or damaged card rather than a software issue.
Try to clean the cooloer with a small brush or just blow some air into it.