Hi, I'm new to this forum, and I stumbled across it while I was researching my computer problem that has been occurring for a few days now. It's been locking up quite often recently, and acting really weird - what makes me think it's some sort of memory problem. The only thing is that I have no idea how to determine if this problem is a result of a software or a hardware problem. So if anybody here has any knowledge on this particular situation and could help me out I would really appreciate it. I've uploaded one of the memory dumps here: Memory.dmp (edit) - dmp file is 1GB, how do I reduce the size so that I can upload? I'll upload more of them as they occur, I had my memory dump settings to overwrite so I only have the most recent one at the moment. Some of the actual error messages are Page_Fault_in_Non_Paged_Area, and sometimes it references a windows .sys file. Once it even referenced an ATI file, but I don't see how it could be my video card at this point. I have also run Memtest86+ as I was booting up and nothing came up after about 3 runs through, I'm going to try it out overnight though to test further. If anyone has any insight to this problem, I would appreciate it! My PC hardware setup: AMD Athlon 64 3200+ 1GB DDR SDRAM ATI Radeon 9600 120GB WDC, 40GB Maxtor drives Windows XP Let me know if any more info is needed other than a couple more dump files.