Hi Khali1 and
Can you give us a bit more info, please? Can you tell us which Operating System you are using, i.e. XP, ME, Win9x, etc?
Has this just suddenly started happening? If so, did you install or uninstall anything immediately prior to the problem starting?
Have you tried starting in Safe Mode, and if so, does the problem still occur?
If you have ME or XP, and the problem is fairly recent, have you tried using System Restore, to go back to a date before the problem started? Assuming, that is, you can get that far without it freezing.
Hopefully one of our techies will be able to help you soon.