The creature known as BSoD lives silently on every Windows computer. It's always watching and waiting for that perfect hardware, driver, or software error that will cause Windows to stop working properly. Once it senses your computer's weakness, it strikes hard and fast, leaving you with no other option than to restart the computer. This could happen if there is a virus on your computer or a missing driver. It could also happen seemingly randomly. If you do encounter this beast, the first thing you should do is restart your computer.
Most of the time, the BSoD will not reoccur after a good restart. If it does however, figure out what you were doing to make the BSoD appear. If you just installed something new - like a CD drive or even a new jump drive - remove it and restart. Search the Internet for updated drivers for your part. If it is a software problem, uninstall the offending software. If it still happens, or if it isn't a specific program or hardware causing the problem, you may be missing system files. In this case, you should use your Windows CD to perform a repair install. If a repair install doesn't work, take down the stop error number and use Microsoft's knowledgebase for the answer.