PAGE-FAULT-IN-NONPAGED-AREA or UNEXPECTED-KERNEL-MODE-TRAP bsod

Hi. I tried to analyze the cause of frequent BSODS on my computer using bluescreenview and information from forums, but so far no results. Each time I get different kind of BSOD like PAGE-FAULT-IN-NONPAGED-AREA or UNEXPECTED-KERNEL-MODE-TRAP or DRIVER-IRQL-NOT-LESS-OR-EQUAL.
I have Win XP sp 3, intel core i5 cpu, nvidia geforce gtx 470, motherboard - asus p7h55/usb3. I used memtest to check my memory and it showed no errors.
I provided set of minidump files. Can somebody please help me to figure out the problem.

Have you tried booting from your windows cd and used the repair option, which fixes most of the problems related to bsod's. Or you can run check disk from the recovery console as well to see if there are any file system issues. Removing all but one stick of RAM to see if you can boot normally is another way to isolate a possible cause of BSOD's.

I reinstalled my OS, but it didn't help. I used memtest to check my RAM, so I don't think it's the problem.

According to me, if reinstalling the Operating System did not solve your issue, then you should make sure that your hard disk is working properly and is not the reason behind the issue. You can do that by trying to run your Hard disk in some other system and check how it is performing by doing the "chkdsk" test. If you are unable to understand the real cause of the problem, then most probably you would have to check up your system to a Computer store for repairing as per the issue.