I have received an Asus A6T laptop for repair, that always crashes on boot with STOP 0x0A IRQL_NOT_LESS_OR_EQUAL. The crash happens even in safe mode. Memtest86+ doesn't show any RAM errors, and swapping out the memory module doesn't in general fix the error, but putting in one specific memory module allows the system to boot properly (all other modules I have tried produce STOP 0x0A). The machine had some malware infections that I cleaned up (using the working memory module to allow the system to boot), and installed a few driver updates, but the error still persists.
The system is an AMD Turion (memory controller in the CPU).
Any idea what could be causing this? I'm sure it is a hardware problem, as replacing the RAM affects it.