Hardware:
-clean dusty FAN CPU,Board, blew slot of RAM and VGA card(if have)
-Reset RAM/Data Cable HDD
Software:
1-uninstalling, updating or rolling back the driver that contains thedriver file the Blue Screen mentions (using Driver Genius Professional) FOR BETTER SHOULD UPDATE DRIVERS
2-Scan disk(Tool windows or other soft)
3-Repair/Reinstall windows
If still not ok
if possible:
1-unplug old RAM and plug new for testing
2-Do the same RAM for VGA Card
3-Chang HDD