The system has recovered from a serious error

[SpaceMagician]

Basically, my computer keeps randomly rebooting and when it starts back up, this message appears: "The system has recovered from a serious error". There is more, and I'll be sure to post it the next time it happens. The beginning is "BBCode : 6".

More possibly-related info:

I recently eradicated a Trojan horse by deleting the file, C:\WINDOWS\system32\drivers\cdrom because it was nested there. Might that have something to do with it?

I have also been playing Team Fortress 2 and it constantly crashes and says "Error. The instruction at xxxxxxxx referenced memory at xxxxxxxx. The memory could not be read."

 

[ksiemb]

Basically, my computer keeps randomly rebooting and when it starts back up, this message appears: "The system has recovered from a serious error". There is more, and I'll be sure to post it the next time it happens. The beginning is "BBCode : 6".

More possibly-related info:

I recently eradicated a Trojan horse by deleting the file, C:\WINDOWS\system32\drivers\cdrom because it was nested there. Might that have something to do with it?

I have also been playing Team Fortress 2 and it constantly crashes and says "Error. The instruction at xxxxxxxx referenced memory at xxxxxxxx. The memory could not be read."

Corrupt driver, other OS component, or memory failure, most likely.
Boot from Windows CD, and repair-install the OS.

Memory Test Software:
http://pcsupport.about.com/od/toolsofthetrade/tp/memorytest.htm