When I install a new video card I get a windows protection error on start up. What to do????

It's a AST computer. They no longer exist. Everything works fine until I put this card in. It only tells me, "Windows protection error. You must restart your computer." Any help would be appreciated. DeeDee|||There is a good chance that the BIOS in your PC is so old that it does not recognise the new video card. That is alway the case with new hard drives and old PC but i am unsure if this is the same with video cards.|||For a lot of hardware, especially for video cards, you need to load the drivers before you install the hardware. Either load the drivers off the CD or download them from the mfrs website. Then, when you boot up, Windows will know how to start.