Windows Error Codes
Searchable reference for Windows error codes — system errors, BSOD stop codes, NTSTATUS, WMI, RPC, MSI installer, AD/Kerberos, BitLocker, DNS, VPN, Hyper-V, COM/DCOM and more. Each entry includes the hex/decimal value, severity, root causes, and a step-by-step troubleshooting workflow.
How to read a Windows error code
Windows surfaces error codes through Win32, NTSTATUS, HRESULT, and many subsystem-specific spaces. Each code has a hex form (e.g. 0x80070005), a signed decimal form (-2147024891), and a symbolic name (ERROR_ACCESS_DENIED). This page lets you look up any of those forms, see what triggers the code, and follow a vetted troubleshooting workflow tuned for the originating subsystem (Windows Update, BSOD, AD/Kerberos, BitLocker, etc.).
44 codes
0x0000009FCriticalDRIVER_POWER_STATE_FAILURE
A driver is inconsistent with power state transitions. Common on laptops during sleep/wake.
0x000000BECriticalATTEMPTED_WRITE_TO_READONLY_MEMORY
A driver attempted to write to read-only memory. Driver bug.
0x000000C2CriticalBAD_POOL_CALLER
A process made an illegal memory pool request. Usually a faulty driver.
0x000000C4CriticalDRIVER_VERIFIER_DETECTED_VIOLATION
Driver Verifier caught a driver violation. Check Driver Verifier settings.
0x000000C5CriticalDRIVER_CORRUPTED_EXPOOL
A driver corrupted pool memory. Run Driver Verifier to identify the culprit.
0x000000D1CriticalDRIVER_IRQL_NOT_LESS_OR_EQUAL
A driver attempted to access pageable memory at an improper IRQL. Common driver bug.
0x000000EACriticalTHREAD_STUCK_IN_DEVICE_DRIVER
A thread in a device driver was stuck in an infinite loop. Often GPU driver related.
0x000000EFCriticalCRITICAL_PROCESS_DIED
A critical system process died. Usually wininit.exe, csrss.exe, or winlogon.exe.
0x000000F4CriticalCRITICAL_OBJECT_TERMINATION
A critical process or thread terminated unexpectedly. Often a failing disk or corrupt system files.
0x000000FECriticalBUGCODE_USB_DRIVER
USB driver error. Try unplugging USB devices or updating USB drivers.
0x00000116CriticalVIDEO_TDR_FAILURE
Video TDR failure — GPU driver stopped responding and failed to recover. Update GPU drivers.
0x0000013ACriticalKERNEL_MODE_HEAP_CORRUPTION
Kernel mode heap corruption detected. Usually a driver bug.
0x00000154CriticalUNEXPECTED_STORE_EXCEPTION
An unexpected exception occurred in the store stack. Can be caused by failing storage.
0x00000164CriticalWIN32K_CRITICAL_FAILURE
win32k.sys critical failure. Can be caused by display driver or kernel patch issues.
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