I think my playstation 3 has a virus. ive had been playing my brothers Grand Theft Auto 4 game for a while now and this past Christmas he got me my own it was used but i have been playing it online but ever sense i put it in my PS3 ive been having problems. the first time i put it in the whole system froze momentarily so i shrugged it off. but last week it knocked me back to level 3 and i just got to level 4. so i got back to level 4 and now it wont even let me in the game it freezes up when loading. but if it duse it kicks me off online play right when i get into the match. so do i have a virus or something else going on. ( disk not scratched ) and my connection to the PS network is above 20%.