Hi Ive had one of these .pif viruses over msn and it has completely destroyed my computer. When i turn on my computer it goes on the the windows xp log in screen. After that i type in my password and it says logging in but it doesnt log in it says in text logging off. I tried restoring the computer by pressing f8 when booting the computer and even safe mode with command prompt but nothing works it just wont log in and i have nothing else to do.