Hello all.
After several days trying to figure out what is happening I come here to ask for advice.
I have this computer from a client that is getting a recurrent blue screen "Page fault in non paged area" with a stop 0x00000050.
The computer was heavily infected with several virus including some variants of Virut (attack .exe files), It affected almost every system related .exe file making windows very unstable, according to the well known anti-virus makers, KAV, Avira, Avast, there is no effective way to disinfect a .exe file corrupted by virut, so after using a rescue Anti-virus CD the best choice was to delete compromised files.
After 2 runs of the anti-virus CD's (kav,avira,bitdefender) everything came out clean, of course many vital system files were deleted and windows was unable to load, I made a windows repair using the WinXP CD, and the system was again operative and running but the BSOD was again there with the same error.
I used several softwares to double and triple check the absence of any virus, SuperAntispyware, Malwarebytes' Anti-Malware, Anti root kits programs, Un-hackme, prevx, etc... everything was clean.
After reading some about that error, all the comments were very generic, seems like this can be caused by many reasons (defective ram, corrupted third party driver, even a virus according to Microsoft support pages).
I also tested the RAM memory using memtest86 under DOS, no errors (it has a single 1GB card).
Made several tests to the hard drive, no surface errors, no bad sectors no file system errors.
The client had everything backed up so I opted to do a full system reinstall to be completely sure that no virus was still there (even after all the scans).
That didn't help either, the same error after windows boot completely.
The PC is an old AMD 3000 with a MSI Motherboard K8N, 1GB RAM single card, 80GB HDD.
Also tested with another PSU, same problem.
Do you have any other test/advice in this matter?
I tried to be the most specific as possible, but I might have some limitation because English is not my native language.
Thanks in advanced.
After several days trying to figure out what is happening I come here to ask for advice.
I have this computer from a client that is getting a recurrent blue screen "Page fault in non paged area" with a stop 0x00000050.
The computer was heavily infected with several virus including some variants of Virut (attack .exe files), It affected almost every system related .exe file making windows very unstable, according to the well known anti-virus makers, KAV, Avira, Avast, there is no effective way to disinfect a .exe file corrupted by virut, so after using a rescue Anti-virus CD the best choice was to delete compromised files.
After 2 runs of the anti-virus CD's (kav,avira,bitdefender) everything came out clean, of course many vital system files were deleted and windows was unable to load, I made a windows repair using the WinXP CD, and the system was again operative and running but the BSOD was again there with the same error.
I used several softwares to double and triple check the absence of any virus, SuperAntispyware, Malwarebytes' Anti-Malware, Anti root kits programs, Un-hackme, prevx, etc... everything was clean.
After reading some about that error, all the comments were very generic, seems like this can be caused by many reasons (defective ram, corrupted third party driver, even a virus according to Microsoft support pages).
I also tested the RAM memory using memtest86 under DOS, no errors (it has a single 1GB card).
Made several tests to the hard drive, no surface errors, no bad sectors no file system errors.
The client had everything backed up so I opted to do a full system reinstall to be completely sure that no virus was still there (even after all the scans).
That didn't help either, the same error after windows boot completely.
The PC is an old AMD 3000 with a MSI Motherboard K8N, 1GB RAM single card, 80GB HDD.
Also tested with another PSU, same problem.
Do you have any other test/advice in this matter?
I tried to be the most specific as possible, but I might have some limitation because English is not my native language.
Thanks in advanced.