Windows xp Auto log off (Infected with Virus)

• Boot from windows xp bootable CD
• Press R when asking installation
• Go to windows installation drive (C: or d:)
• Enter password
• C:\copy g:\I386\USERINIT.EX_ C:\WINDOWS\system32\USERINIT.EXE

After copying file
Type Exit

System reboot Normally wait till boot
 

Work Done!