*advanced computer users, I NEED your help.

[blood_hound]

Base on what you describe I am sure you got "saser"

Saser is a Computer Virus that will instantly attack your PC once you connect to the internet if you don't have the latest security patches.

This virus is also undetectable through any other anti virus.

Saser causes bootup problem and a great slow down of a PC.

Solution:
If you manage to bootup do a security update for your OS and try cleaning up your pc of any detectable spyware.

If you cannot bootup the only solution is to re-install your OS.

Hope this help Good Luck