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.).
228 codes
0x00000005ErrorERROR_ACCESS_DENIED
Access is denied. Check permissions or run as administrator.
0x00000006ErrorERROR_INVALID_HANDLE
The handle is invalid. Often caused by a closed or corrupted handle.
0x00000008ErrorERROR_NOT_ENOUGH_MEMORY
Not enough storage is available to process this command.
0x0000000ACriticalIRQL_NOT_LESS_OR_EQUAL
Kernel accessed memory at improper IRQL. Almost always a faulty driver.
0x0000000DErrorERROR_INVALID_DATA
The data is invalid.
0x0000000EErrorERROR_OUTOFMEMORY
Not enough storage is available to complete this operation.
0x0000000FErrorERROR_INVALID_DRIVE
The system cannot find the drive specified.
0x00000012InformationalERROR_NO_MORE_FILES
There are no more files to enumerate.
0x0000001ACriticalMEMORY_MANAGEMENT
Serious memory management error. Run MemTest86 to check RAM.
0x0000001ECriticalKMODE_EXCEPTION_NOT_HANDLED
Kernel mode exception was not handled. Check minidump for offending driver.
0x0000001FErrorERROR_GEN_FAILURE
A device attached to the system is not functioning.
0x00000020WarningERROR_SHARING_VIOLATION
The process cannot access the file because it is being used by another process.
0x00000023CriticalFAT_FILE_SYSTEM
Problem in the FAT file system. Run CHKDSK.
0x00000024CriticalNTFS_FILE_SYSTEM
Problem with the NTFS file system driver. Run CHKDSK on the affected volume.
0x00000026InformationalERROR_HANDLE_EOF
Reached end of file.
0x00000027ErrorERROR_HANDLE_DISK_FULL
The disk is full.
0x0000002ECriticalDATA_BUS_ERROR
Parity error in system memory. Usually indicates faulty RAM or motherboard.
0x00000032ErrorERROR_NOT_SUPPORTED
The request is not supported.
0x00000035ErrorERROR_BAD_NETPATH
The network path was not found. Check UNC path and network connectivity.
0x0000003BCriticalSYSTEM_SERVICE_EXCEPTION
A system service threw an exception. Often caused by a faulty driver. Check minidump for offending module.
0x00000041ErrorERROR_NETWORK_ACCESS_DENIED
Network access is denied.
0x00000044CriticalMULTIPLE_IRP_COMPLETE_REQUESTS
A driver attempted to complete an IRP more than once.
0x00000050CriticalPAGE_FAULT_IN_NONPAGED_AREA
Invalid memory referenced. Caused by faulty RAM, drivers, or system files.
0x00000050WarningERROR_FILE_EXISTS
The file already exists.
0x00000051CriticalREGISTRY_ERROR
Error related to the registry. May indicate disk failure or corrupted hive.
0x00000052ErrorERROR_CANNOT_MAKE
The directory or file cannot be created.
0x00000057ErrorERROR_INVALID_PARAMETER
The parameter is incorrect.
0x0000005ACriticalCRITICAL_SERVICE_FAILED
A critical service failed to start during boot.
0x00000069CriticalIO1_INITIALIZATION_FAILED
I/O initialization failed during boot.
0x00000070ErrorERROR_DISK_FULL
There is not enough space on the disk.