This first started out as a problem installing some of the larger programs such has Adobe CS3 and Microsoft Office 2007. I had a seperate thread on that located here: http://www.techspot.com/vb/topic123304.html After a lot of troubleshooting, I believe that my problem exists in the RAM. I ran the memtest for both sticks of ram individually and they both failed. The first stick will cause my computer to reboot in the middle of the test. The other stick, I will get a message that says 'unexpected interrupt halting CPU0'. So here's my question: Is the memory sticks at fault or my mobo? I want to go ahead and ask for advice so I know if I should buy new RAM or get my mobo replaced. These are my specs for my computer: AMD Athlon 7750 Dual-Core Processor 2.71 GHz GIgabyte GA-MA770-UD3 Microsoft Windows XP Home Edition V2002 SP3 Corsair Dual Channel TWINX 4096MB PC6400 DDR2 800MHz Memory (2 x 2048MB) Can someone confirm that I'm using the right memory? It's not listed on the Gigabyte's website as one of their supported ones, but it also says that many are not listed. Any help on this would be great. I've tried testing the memory on other slots with same results and tried cleaning it with an eraser. Thanks!