So recently my AVG ran out, a few days later, i turn my computer on to find I have a fake AV virus. I google the problem and eventually get rid of it, and then yesterday I installed my AVG and it was working and everything was magical. Today I turned on my computer and AVG resident shield is picking up like 30-40 system32, winlogon and eexplorer viruses saying that they cannot be deleted. So i restarted my computer and now it won't even go into my logon screen. it just turns black and then restarts. i've been meaning to upgrade to W7 for a while and as my computer is rendered useless now i finally want to do it. is it possible for me to recover my XP at all? or do i have to re-do everything and if so, can i put windows 7 on it w/o having to pay for it? thanks in advance. P.S. I don't have the XP installer disk.