If you can enter the taskmanager (ctrl+alt+delete) then you can kill any process you want (well there are probably some resistant ones too that restart themselfs but meh, also make sure you know what you "kill" so you don´t end up killing system32 (then the computer forces a shutdown) or something) and that might make it able to run AVG.
This is the second time I read your newspost and you got a virus so I must ask, what the HELL are you doing on that thing?
Chdonga
Umm, get a Windows.
sniperleader1337
i have windows.