Ever since I upgraded my OptiPlex 755 from XP 32 bit to XP 64 bit, I've been getting a blue screen about ever 1.5 - 2 weeks, that says "NMI Parity Check. Memory Parity Error".
I ran MemTest and Windows Memory Diagnostic boot CD's to check the memory and it says it's passing.
There are no minidumps from the BSOD that I can analyze with WhoCrashed or BlueScreenViewer, so I can't figure out why this is happening.
The drivers for Vista 64 bit and XP 32 bit were loaded, since I couldn't locate any XP 64 bit drivers on Dell's support page. I'm wondering if that could be causing this issue.