My sister's computer has been having a BSOD with this message: Page_fault_in_nonpaged_area stop 0x0x00000050 She also is getting this event in eventviewer type: error source: systemerror Category: (102) EventID 1003 BcCode: 100050 BCP1:FFFFFF78 BCP2: 0000000 BCP3: 80594A9D BCP4: 0000000 OSVER:5_1_2600 S_P: 3_0 Her specs are: HP Pavilion a750e CPU: AMD Athlon 64 3400+ Motherboard: ASUS: either K8S-LA or Salmon-GL6E Ram Speed, size and #sticks: 2 sticks of DDR PC3200, 1 GB each GPU: Nvidia Geforce 7600 GS PSU: not sure as I don't have the computer in front of me right now; probably 350 Watts. We did upgrade her video card and made sure that her power supply that would accomodate the new card. OS: Windows XP Professional SP3 The bsod seems to be a little random but it usually occurs when she clicks on certain folders on her desktop. We have tried rebooting in safe mode and with startup programs disabled, but it stil occurs. Her ram is relatively new, it was already replaced once. She may have run some memory tests on it but I'm not sure. She doesn't remember making any hardware or software changes around the time the bsod started occuring. For some reason her system restore didn't have any restore points saved, so system restore is not an option. We have already searched for solutions for the page fault in nonpaged area error, but none of them have helped. Here are some minidumps. Thanks for any help.