I believe this problem could also be due to a loose IDE/SATA cable, depending on which your HDD uses, or it could be HDD failure.

Ih8bills - Thanks for the link - I've tried what you suggsted but still get the problem when I reboot. I'm hoping I did everthing...

Rodents - How would I check if the IDE/SATA cable was loose :P - sorry, I dont know which one it is.

Thanks guys

IDE cable is a wide,flat, grey (usually) ribbon
SATA is usually Red and narrow-- either one (depending on drive type) transfers the data from your harddrive to your mobo and vice-versa.
It would be connected at the rear of your drive.
The small white connector is the power cable for the drive.

I've checked the wire - both ends are very secure and in place, nothing loose atleast.

OK... then you might be looking at a failing drive.
Just in case it IS -- back up any personal files right away -- tonight if possible--
http://www.pchelpforum.com/tutorials...p-your-pc.html

Failure to do so could result in permanent data loss-- or at least very expensive recovery. Harddrives are cheap-- priceless photos /personal data are not.

Hence why they're priceless.

Thanks - Everything is now backed up. Just incase ...

The weird thing is I left my pc on over night to see if it would be ok in the morning, woke up and its still running great, its only on the start up that it freezes. I almost dont want to turn it off now- incase i cant turn it back on lol.