Hi
Ok, so I've been having this memory access violation problem since yesterday, but let me tell you about my computer first. I built it in August 2006:
AMD Athlon 3800+ 2.4ghz socket am2
Asus M2N-E mobo
2 x 1gb corsair ddr2 ram
sapphire radeon x1900 512mb
creative soundblaster audigy2 zs
seagate barracuda 7200 320GB hd
After I built it, it ran smoothly for about a month, but then it started having blue screen of death errors with a few different messages (page fault in non paged area, irql not less than equal, etc..) and different files specified in the messages ("atikvmag.dll, win32k.sys, ati3dvag.dll, npfs.sys, Lmouke.sys, dxg.sys, etc..). The errors happened about once a day, but I wasn't really concerned because everything seemed to be running fine otherwise. I regularly update graphics/sound drivers and run ad aware. I don't know if any of this is related to my current problem, but it probably is.
Anyways, to the problem... Yesterday morning I was thinking that I should run the disk defragmenter because I have never used it since I built the PC in August, so I defragged my C drive (I have the C drive as my operating system (windows), E as my pagefile, and F for applications) and left the defragmenter running while I went to class. When I came back, I had a new blue screen of death error (driver_overran_stack_buffer) so I rebooted like I always do. At this point I realized that some of my programs no longer worked. Windows Media Player opened but was unable to play any songs. Norton Antivirus seemed to be working, but I couldn't open the "protection center" (error msg: unable to start the integrator"). Microsoft Word didn't work (error msg: word has encountered a problem and needs to close). Also, none of my large games worked(Counter-Strike: Source, Age of Empires III, Battlefield 2, Rainbow Six Vegas). For Word and all of the games, the error that I get immediately after trying to open them is "The application failed to initialize properly (0xc0000005). Click on OK to terminate the application" (then I click OK and the box appears again with the same message, and then goes away after the second time). I figure that all of these errors must be related, but I don't know why they are happening.
I've tried alot of things to fix them, and im hoping not to have to reformat everything. I tried updating graphics drivers (maybe they became corrupt somehow even though I updated them 1/10/07) but the install program now has an error as well and I don't know how to install them manually. I tried running all kinds of anti virus programs and spyware detectors in safe mode (ad aware, panda software, trend micro) and my system appears clean. I've used Hijack This. I ran memtest86 which said that my ram had no errors. I tried disabling startup processes, and I tried reinstalling the programs that had errors (reinstalling Windows Media Player worked, but reinstalling the games/MS word did not work).
Any help you can give me is much appreciated
Thank you