When you restart in Safe Mode go to the Admin account. From there remove the AVG. That should take care of the reboot issue.
As for the Virus run NOD32 or Avast!. They are among the best on the market for Virus removal.
Just finished reading the other thread with the Virus/spyware problem.
To backup 30GB of data you would need a whole lot of DVD'd. Since DVD's are only 4.5GB each that would equal about 8 or 9 DVD's.
Download those apps that Warez told you about. Run them from within safe mode in the admin account. Also remove the AVG.
That is for Avast. Try that out and see if it works better for you. NOD32 is by payment only.