cottoncandysky

I just got a computer from a friend, they say there is something wrong with the video card. The computer will turn on and XP loads and it will run for random amounts of time and then the blue screen comes up saying Windows shut down to prevent serious damage and gives me different codes and different reasons why it shut down each time. Once it was shell32.dll, another time it was win32k.sys, always different. Its an AMD Duron 1.2GHz 120MB RAM. When I go into the hardware devices the Media, and Video Card say they arent working properly. I tried to uninstall and reinstall the drivers but no luck. Its an onboard video card, Trident 3D ProMedia. My question:
Is it the video card?
If I install a new one should that fix the problem?
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ack okay I take it back, I reformatted the harddrive and now there is no problem with any of the media in the Device Manager. But the other problem I have (have had from the start) is in the "Other Devices" catagory. It says the PCI Simple Communications Controller isn't working. It SAYS the drivers arent installed but I am afraid to try installing them for fear of messing the other stuff up.