Like I said, i don't know much about computers so this is what I can tell you. It is a Gateway media center Edition 2005
AMD 64 X2
This happened a few months after I bought it in 2006 and I have not used it since. I had just installed a new Norton Antivirus so I didn't think that it was a virus. I have tried some of the suggestions that I read on here like pressing F8 while the computer is starting up. I tried going to safemode, Last Known Configurations, Disable automatic restart on system failure. Nothing works.
Let me know if there is information about the computer that you need to know in order to help that I am not giving and I will try and firgure out how to tell you.
Thanks!!!!!