A number of things could explain system problems that are surprisingly easy to fix once you know just what it or them is. A shaky supply will definitely be a problem with voltages all over. An overheating problems will also be a definite cause at times to see several problems come up. A simple bios update may see improvements right off. Generally that is a rec for those running dual cored model cpus. What was found on an older board that was just replaced when memtest flashed red on 573 failing memory addresses in test #5 wasn't the memory.
Memtest showed no errors later when memory timings there were reduced and now on the new board that replaced a failing chipset. But that was on a board that has been through the mill. You shouldn't be seeing errors for that reason unless you got the board with a defect which probably wouldnt even allow you to boot the system to the desktop. Having run memtest for a full day rules memory out there. Prime95 is a little outdated at this point for most newer systems. It could even have a conflict with a newer program you have running where it shows the error message. I could recommend SpeedFan to see if you noticed any voltage or temp problems pointing at hardware while suggesting the msconfig utility to reduce all startups to the basic Windows and try Prime95 again or an even newer benchmark program. SiSoftware's Sandra was one that got favored reviews often enough.
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