IRQL_NOT_LESS_OR_EQUAL (a) An attempt was made to access a pageable (or completely invalid) address at an interrupt request level (IRQL) that is too high. This is usually caused by drivers using improper addresses. If a kernel debugger is available get the stack backtrace. Arguments: Arg1: 61616161, memory referenced Arg2: 00000002, IRQL Arg3: 00000000, bitfield : bit 0 : value 0 = read operation, 1 = write operation bit 3 : value 0 = not an execute operation, 1 = execute operation (only on chips which support this level of status) Arg4: 8167fcab, address which referenced memory Debugging Details: ------------------ *** ERROR: Module load completed but symbols could not be loaded for nipplpt.sys READ_ADDRESS: 61616161 CURRENT_IRQL: 2 FAULTING_IP: nt!KeReleaseSemaphore+af 8167fcab 8b00 mov eax,dword ptr [eax] DEFAULT_BUCKET_ID: WIN8_DRIVER_FAULT BUGCHECK_STR: AV PROCESS_NAME: System ANALYSIS_VERSION: 6.3.9600.17029 (debuggers(dbg).140219-1702) x86fre TRAP_FRAME: a9ccd94c -- (.trap 0xffffffffa9ccd94c) ErrCode = 00000000 eax=61616161 ebx=00000000 ecx=61616161 edx=81756700 esi=8beeff20 edi=8186b120 eip=8167fcab esp=a9ccd9c0 ebp=a9ccd9f4 iopl=0 ov up ei ng nz ac pe cy cs=0008 ss=0010 ds=0023 es=0023 fs=0030 gs=0000 efl=00010a97 nt!KeReleaseSemaphore+0xaf: 8167fcab 8b00 mov eax,dword ptr [eax] ds:0023:61616161=???????? Resetting default scope LAST_CONTROL_TRANSFER: from 817d97c4 to 81758194 STACK_TEXT: a9ccd454 817d97c4 00000003 419ab74a 00000065 nt!RtlpBreakWithStatusInstruction a9ccd4a8 817d92de 86c44340 a9ccd8a8 a9ccd94c nt!KiBugCheckDebugBreak+0x1f a9ccd87c 81756d46 0000000a 61616161 00000002 nt!KeBugCheck2+0x676 a9ccd8a0 8176b393 0000000a 61616161 00000002 nt!KiBugCheck2+0xc6 a9ccd8a0 8167fcab 0000000a 61616161 00000002 nt!KiTrap0E+0x1cf a9ccd9f4 8beea360 8beeff20 00000000 00000001 nt!KeReleaseSemaphore+0xaf WARNING: Stack unwind information not available. Following frames may be wrong. a9ccdc30 81718f9e 00000001 419abf92 00000000 nipplpt+0x1360 a9ccdc70 8176c6d1 8beea249 00000001 00000000 nt!PspSystemThreadStartup+0x58 a9ccdc7c 00000000 00000000 00000000 00000000 nt!KiThreadStartup+0x15 STACK_COMMAND: kb FOLLOWUP_IP: nipplpt+1360 8beea360 5f pop edi SYMBOL_STACK_INDEX: 6 SYMBOL_NAME: nipplpt+1360 FOLLOWUP_NAME: MachineOwner MODULE_NAME: nipplpt IMAGE_NAME: nipplpt.sys DEBUG_FLR_IMAGE_TIMESTAMP: 5472c94a FAILURE_BUCKET_ID: AV_nipplpt+1360 BUCKET_ID: AV_nipplpt+1360 ANALYSIS_SOURCE: KM FAILURE_ID_HASH_STRING: km:av_nipplpt+1360 FAILURE_ID_HASH: {f120251d-9712-1180-b3ee-3ba90135aac7} Followup: MachineOwner ---------