Infinite restarting

Hi,

My 5-year-old Fujitsu laptop recently has this problem of rebooting infinitely. I did not install any new hardware or software. The only thing different that I did was that for the past 3 years, I only ran it on AC power, and right before this problem occurred, I unplugged the power and ran it on the battery for about half an hour.

The laptop starts booting up, and while the Windows XP screen is running, I would get the following screen:

"Checking file system on C:
The type of the file system is FAT32.

One of your disks need to be checked for consistency.
..."

The laptop then continues to check disk consistency. Occasionally, it'll report some entries that need to be repaired, while other times there aren't any repairing to be done.

The laptop then restarts itself, sometimes after the check is completed, other times while the check is still running. Right before the laptop restarts, I'll get the blue screen for a couple of seconds (too fast to really see what it says). I am able to get the blue screen to stay on my screen by using one of the F8 options, though, and it says:

DRIVER_IRQL_NOT_LESS_OR_EQUAL
...
Technical information:
*** STOP:0x000000D1 (0x73656CD7, 0x00000002, 0x00000000, 0xF902BA68)
*** w22n51.sys - Address F902BA68 base at F9007000, DateStamp 404c5c4c

I am unable to get into safe mode - the system hangs at agpCPQ.sys. Trying to load the last known good configuration doesn't work - the laptop continues to restart itself. I also don't have the Windows XP CD, so I can't try to use the Recovery Console method that I've seen suggested on the Net.

What can I do?

Thank you.