not booting, hd restarting, bios problems

Hi guys,

Ive got a great one here. Ive spent so much time on this machine, i am not completly lost on what to do.

Basically i had a machine on windows xp, im not sure what happened but then when i booted it via safe mode it used to stop after gagp30kx.sys, so then i tried to update my bios which was unsucsseful, but then miraculously whilst using another harddrive in the computer ran, i was able to back up all the important information, i then took out the other hd and installed a fresh copy of vista all of which went smoothly i replugged in the other hd and put all the info back and installed office, it was perfect, i then changed some of the graphics options on the bios and hey presto problem is back, but now i cant get it to do anything.

Ive cleared the cmos, and only when i hit f2 (load defulats) will it continue to boot, if i for example hit f1 and go to bios and change nothing but save and exit then the problem will be back. When it happens the hd restarts, i know this becase of the noise it makes, so now if i hit f2 and get to the safemode option the computer will mostlikely stop at crcdisk.sys and i have waited for over 2 hours at this stage but i get nothing. im almost certain its not a hd problem, but something to do with the bios, so if any1 knows what i can do to change the bios. also, when i hit f2 what are those default values, ive tried to ruun optimal and fail safe via bios but still the same problem. Sorry for the long message

Any help would b appretiated

Thanks

 

Did you install your motherboard drivers after installing Vista? gagp30kx.sys is for your AGP graphics which would seem as though you didn't install the chipset drivers.

Do you have anything other than the keyboard and mouse plugged into your USB ports? Make sure USB support is enabled in the Bios. Again make sure your motherboard drivers are installed.

Knowing the system specifications would help to narrow down the problem.

 

This is not a BIOS problem since crash occurs during loading of OS meaning that BIOS had given control to the MBR which in turn has given control to the OS loader.