First, restart your computer in safe mode by press F8.
Second, choose safemode only from the list, not with network or ms-dos.
Third, login and go to Start>Seach, then type "drivers.bat".
You will see the drivers.bat in list. So, delet all drivers.bat from your computer (only drivers.bat files not anything else). After that, restart your computer, and login.
Your computer should be working fine..