Yes, that a is the code; actually the full code and definition is 0x0000000A: IRQL_NOT_LESS_OR_EQUAL Typically due to a bad driver, or faulty or incompatible hardware or software. Technically, this error condition means that a kernel-mode process or driver tried to access a memory location to which it did not have permission, or at a kernel Interrupt ReQuest Level (IRQL) that was too high. (A kernel-mode process can access only other processes that have an IRQL lower than, or equal to, its own.) Basically due to hardware or drivers. Are you saying that when the minidump files are in the original Minidump Folder in Windows you are not allowed to attach them?