WinXP Pro x64 Keeps Crashing

Hello all,

I am about at my wits end, my computer keeps crashing over and over, every 1 or so, I have no idea whats causing it, the computer is relatively new too.

Its a AMD Athlon64 X2 4200+, 2GB Ram, 160GB HDD, Onboard NVidia 6100 GPU, Onboard Sound.

I took a look at the minidump's using WinDBG, but they dont give me any information that helps, according so some of the info I have gathered off the net, the Module name and Image Name should tell me whats causing the problem, but as you can see (pasted below), they dont tell me anything. All the minidumps say essentially the same thing, I am thinking about reinstalling windows, but I can't help but wonder if this problem will just happen again. I have also ran memtest86 and i passed all the tests, no errors.

If you have any idea as to the problem, or possibly need more info to help me diagnose this, dont hesitate to ask! Please help!

p.s. It even crashed while I was writing this message! Thank god for firefox's restore tabs

BUGCHECK_STR: 0x109
CUSTOMER_CRASH_COUNT: 7
DEFAULT_BUCKET_ID: COMMON_SYSTEM_FAULT
PROCESS_NAME: System
CURRENT_IRQL: 0
LAST_CONTROL_TRANSFER: from 0000000000000000 to fffff8000102e890
STACK_TEXT:
fffffadf`caa63838 00000000`00000000 : 00000000`00000109 a3a03a38`61fc6ad1 b3b746be`b47b464d fffffadf`d04dcad8 : nt!KeBugCheckEx
STACK_COMMAND: kb
SYMBOL_NAME: ANALYSIS_INCONCLUSIVE
FOLLOWUP_NAME: MachineOwner
MODULE_NAME: Unknown_Module
IMAGE_NAME: Unknown_Image
DEBUG_FLR_IMAGE_TIMESTAMP: 0
BUCKET_ID: BAD_STACK