IRQL_NOT_LESS_OR_EQUAL bug check code 0x0000000a caused by - Microsoft . . . The IRQL_NOT_LESS_OR_EQUAL is a BSOD (Blue Screen of Death) error This error occurs at Windows startup and with a STOP Code: 0x0000000A Generally, this error occurs due to the faulty device driver, device memory, Malicious Software installed on PC, Corrupt System Files, Wrong Windows Installation etc