ErrorFindly

Windows Error Codes — Complete Troubleshooting Database

668 Windows error codes with step-by-step fix guides. Covers BSOD stop codes, Windows Update errors, system errors, application crashes, and activation issues for Windows 10 and 11.

295
BSOD
207
Update
105
System
24
Application
12
Activation
25
Office

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Showing 100 of 668 errors

0-1011Office Network IssueOfficeMedium0x00000001APC Index MismatchBSODCritical0x00000002Device Queue not BusyBSODCritical0x00000003Invalid Affinity SetBSODCritical0x00000004Invalid Data Access TrapBSODCritical0x00000005Invalid Process Attach AttemptBSODCritical0x00000006Invalid Process Detach AttemptBSODCritical0x00000007Invalid Software InterruptBSODCritical0x00000008IRQL not Dispatch LevelBSODCritical0x00000009IRQL not Greater or EqualBSODCritical0x0000000AIRQL not Less or EqualBSODCritical0x0000000BNo Exception Handling SupportBSODCritical0x0000000CMaximum Wait Objects ExceededBSODCritical0x0000000DMutex Level Number ViolationBSODCritical0x0000000ENo User Mode ContextBSODCritical0x0000000FSpin Lock Already OwnedBSODCritical0x00000010Spin Lock not OwnedBSODCritical0x00000011Thread not Mutex OwnerBSODCritical0x00000012Trap Cause UnknownBSODCritical0x00000014Create Delete Lock not LockedBSODCritical0x00000015Last Chance Called from KmodeBSODCritical0x00000016Cid Handle CreationBSODCritical0x00000017Cid Handle DeletionBSODCritical0x00000018Reference by PointerBSODCritical0x00000019Bad Pool HeaderBSODCritical0x0000001AMemory ManagementBSODCritical0x0000001BPFN Share CountBSODCritical0x0000001CPFN Reference CountBSODCritical0x0000001DNo Spin Lock AvailableBSODCritical0x0000001EKmode Exception not HandledBSODCritical0x0000001FShared Resource Conv ErrorBSODCritical0x00000020Kernel APC Pending During ExitBSODCritical0x00000021Quota UnderflowBSODCritical0x00000022File SystemBSODCritical0x00000023FAT File SystemBSODCritical0x00000024NTFS File SystemBSODCritical0x00000025NPFS File SystemBSODCritical0x00000026CDFS File SystemBSODCritical0x00000027RDR File SystemBSODCritical0x00000028Corrupt Access TokenBSODCritical0x00000029Security SystemBSODCritical0x0000002AInconsistent IRPBSODCritical0x0000002BPanic Stack SwitchBSODCritical0x0000002CPort Driver InternalBSODCritical0x0000002DSCSI Disk Driver InternalBSODCritical0x0000002EData Bus ErrorBSODCritical0x0000002FInstruction Bus ErrorBSODCritical0x00000030Set of Invalid ContextBSODCritical0x00000031Phase0 Initialization FailedBSODCritical0x00000032Phase1 Initialization FailedBSODCritical0x00000033Unexpected Initialization CallBSODCritical0x00000034Cache ManagerBSODCritical0x00000035No More IRP Stack LocationsBSODCritical0x00000036Device Reference Count not ZeroBSODCritical0x00000037Floppy Internal ErrorBSODCritical0x00000038Serial Driver InternalBSODCritical0x00000039System Exit Owned MutexBSODCritical0x0000003ASystem Unwind Previous UserBSODCritical0x0000003BSystem Service ExceptionBSODCritical0x0000003CInterrupt Unwind AttemptedBSODCritical0x0000003DInterrupt Exception not HandledBSODCritical0x0000003EMultiprocessor Configuration not SupportedBSODCritical0x0000003FNo More System PtesBSODCritical0x00000040Target MDL Too SmallBSODCritical0x00000041Must Succeed Pool EmptyBSODCritical0x00000042Atdisk Driver InternalBSODCritical0x00000043No Such PartitionBSODCritical0x00000044Multiple IRP Complete RequestsBSODCritical0x00000045Insufficient System Map RegsBSODCritical0x00000046Deref Unknown Logon SessionBSODCritical0x00000047Ref Unknown Logon SessionBSODCritical0x00000048Cancel State in Completed IRPBSODCritical0x00000049Page Fault with Interrupts OffBSODCritical0x0000004AIRQL Gt Zero at System ServiceBSODCritical0x0000004BStreams Internal ErrorBSODCritical0x0000004CFatal Unhandled Hard ErrorBSODCritical0x0000004DNo Pages AvailableBSODCritical0x0000004EPFN List CorruptBSODCritical0x0000004FNDIS Internal ErrorBSODCritical0x00000050Page Fault in Nonpaged AreaBSODCritical0x00000051Registry ErrorBSODCritical0x00000052Mailslot File SystemBSODCritical0x00000053No Boot DeviceBSODCritical0x00000054Lm Server Internal ErrorBSODCritical0x00000055Data Coherency ExceptionBSODCritical0x00000056Instruction Coherency ExceptionBSODCritical0x00000057XNS Internal ErrorBSODCritical0x00000058Ftdisk Internal ErrorBSODCritical0x00000059Pinball File SystemBSODCritical0x0000005ACritical Service FailedBSODCritical0x0000005BSet Env Var FailedBSODCritical0x0000005CHAL Initialization FailedBSODCritical0x0000005DUnsupported ProcessorBSODCritical0x0000005EObject Initialization FailedBSODCritical0x00000060Process Initialization FailedBSODCritical0x00000061Hal1 Initialization FailedBSODCritical0x00000062Object1 Initialization FailedBSODCritical0x00000063Security1 Initialization FailedBSODCritical0x00000064Symbolic Initialization FailedBSODCritical0x00000065Memory1 Initialization FailedBSODCritical

Error Categories

BSOD295 codes

Blue Screen of Death (BSOD)

Windows Stop codes that cause blue screen crashes. Hardware failures, driver issues, and kernel errors.

Update207 codes

Windows Update Errors

Error codes from Windows Update, WSUS, and automatic update services.

System105 codes

System Errors (HRESULT/Win32)

Common Windows system error codes including HRESULT and Win32 API errors.

Application24 codes

Application Errors (NTSTATUS)

Runtime application errors including access violations, DLL issues, and process failures.

Activation12 codes

Activation & License Errors

Windows activation, licensing, and KMS error codes.

Office25 codes

Microsoft Office Errors

Error codes from Outlook, Excel, Word, and other Microsoft Office applications.

Most Common Windows Errors

0x000000EFCritical Process DiedBSOD0x0000000AIRQL Not Less or EqualBSOD0x00000050Page Fault in Nonpaged AreaBSOD0x0000003BSystem Service ExceptionBSOD0x00000133DPC Watchdog Violation (Deprecated)BSOD0x00000139Kernel Mode Heap CorruptionBSOD0x00000116Video TDR FailureBSOD0x00000124WHEA Uncorrectable ErrorBSOD0x000000D1Driver IRQL Not Less or EqualBSOD0x0000001AMemory ManagementBSOD0x80070005Access DeniedSystem0x80004005Unspecified ErrorSystem0x80070002File Not FoundSystem0x80070057Invalid ParameterSystem0x80240017Update Not ApplicableUpdate0x80070422Service DisabledUpdate0x80070490Element Not FoundUpdate0xC0000005Access ViolationApplication0xC0000135DLL Not FoundApplication0xC004F074KMS Activation FailedActivation

Essential Windows Diagnostic Tools

System File Checker

Scans and repairs protected system files

sfc /scannow

DISM Repair

Repairs the Windows component store

DISM /Online /Cleanup-Image /RestoreHealth

Check Disk

Checks disk for errors and recovers readable information

chkdsk /f /r

Memory Diagnostic

Tests RAM for hardware errors

mdsched.exe

Event Viewer

View detailed system and application error logs

eventvwr.msc

Device Manager

Check for driver issues and update drivers

devmgmt.msc

Reliability Monitor

View system stability history and error timeline

perfmon /rel

Windows Update Troubleshooter

Automatically diagnose and fix update problems

ms-settings:troubleshoot

Disk Cleanup

Free up disk space by removing temporary files

cleanmgr

Driver Verifier

Stress-test drivers to find faulty ones causing BSOD

verifier

When to Seek Professional Help

Always consult a pro

  • ⚠Repeated BSOD errors — especially WHEA_UNCORRECTABLE_ERROR or MACHINE_CHECK_EXCEPTION
  • ⚠Data recovery from corrupted drives showing NTFS_FILE_SYSTEM errors
  • ⚠BSOD after hardware changes that persists through Safe Mode
  • ⚠Activation errors on enterprise/volume license deployments

Consider professional help

  • ●Windows Update failures that persist after resetting components
  • ●Application errors affecting business-critical software
  • ●Multiple BSOD codes appearing randomly (suggests hardware failure)
  • ●System errors preventing Windows from booting

Safe to DIY

  • ✓Single BSOD occurrence that doesn't repeat
  • ✓Windows Update errors resolved by troubleshooter
  • ✓Application errors from known software conflicts
  • ✓Office connection errors from server configuration changes

Frequently Asked Questions

How do I find my Windows error code?
For BSOD errors, the stop code is displayed on the blue screen (e.g., CRITICAL_PROCESS_DIED). For other errors, check the error dialog message, Windows Event Viewer (eventvwr.msc), or the Windows Update history in Settings > Update & Security > Windows Update > View update history.
What is the first thing I should try when I get a Windows error?
Start with these universal steps: 1) Restart your computer, 2) Run Windows Update to install latest patches, 3) Run 'sfc /scannow' in an elevated Command Prompt to repair system files, 4) Run 'DISM /Online /Cleanup-Image /RestoreHealth' to repair the Windows image.
How do I run System File Checker (sfc /scannow)?
Press Win+X and select 'Terminal (Admin)' or 'Command Prompt (Admin)'. Type 'sfc /scannow' and press Enter. Wait for the scan to complete (it may take 10-30 minutes). If it finds and repairs files, restart your computer and check if the error is resolved.
How do I boot into Safe Mode on Windows 10/11?
Hold Shift while clicking Restart from the Start menu. Navigate to Troubleshoot > Advanced Options > Startup Settings > Restart. Press F4 for Safe Mode or F5 for Safe Mode with Networking. Alternatively, press Win+R, type 'msconfig', go to Boot tab, check 'Safe boot', and restart.
What does HRESULT mean in Windows errors?
HRESULT is a 32-bit error code format used throughout Windows. The 0x8 prefix indicates an error (failure). The next digits identify the facility (source component) and the specific error. For example, 0x80070005 means facility 7 (Win32) with error 5 (Access Denied).
When should I contact Microsoft Support for a Windows error?
Contact Microsoft Support if: the error persists after trying all recommended fixes, you suspect a hardware failure (repeated BSOD with WHEA_UNCORRECTABLE_ERROR), you have activation issues with a legitimate license, or you need help with a Windows Update that fails repeatedly.