Well my computer is basically living on a cliff. The program that manages the task bar etc. (explorer.exe) keeps shutting off! How can I restore my computer as if it were brand new? Thanks.

Some virus removal software. (Sucess not guaranteed)
Format (success guaranteed), backup stuff you want first.
You may google for some system cleaners etc.

Thanks man, but is there an easy way to format? I don't have the XP disc because, the PC came with XP already installed.

I've got rid of the virus but explorer.exe keeps closing then opening over and over! Anything look suspicious from this picture?