向高手求救！我的计算机可能中毒了?!

有一天开机 (Dell Window XP 2003年)，突然出现蓝色画面，以下是我快抄的 message:

A problem has detected and window has been shut down to prevent damage to your computer
IRQL_NOT_LESS_OR_EQUAL

If this is the first time you’ve seen this stop error screen restart your computer. If this screen appears again, follow these step, check to make sure any new hardware or software is properly installed. If this is (the screen went blank, I missed this part)…Dumping Physical Memory…

之后，一个朋友帮我把XP Home Edition 再安装回去，将C槽的档案移到D槽去做Backup, C槽reformtted。本以为就"天下太平"了，谁知道当我陆续将从前的软件安装回去时(Adobe,Photoshop, etc)，机器一会儿就又出现蓝色画面, 我要不停的关机开机，有时就行，有时又要把XP Home Edition 再安装回去. 不过蓝色画面的Message不同了...

Stop: C00021a {Fatal System Error}
The window subsystem system process terminated unexpectedly w/ a status of 0C0000005C (0 x75e.900980 x 0349f248) The system has been shut down

请问高手们 - 我的计算机可能中毒了?!该怎么办呢？