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.).

All categories System errors Windows Update BSOD stop NT Status AD / Kerberos RPC / Network WMI MSI Installer Office activation BitLocker DNS VPN / Remote Hyper-V COM / DCOM

Severity:All severities Critical Error Warning Info

32 codes

0x00000154Critical

UNEXPECTED_STORE_EXCEPTION

An unexpected exception occurred in the store stack. Can be caused by failing storage.

BSOD stop340

0x00000164Critical

WIN32K_CRITICAL_FAILURE

win32k.sys critical failure. Can be caused by display driver or kernel patch issues.

BSOD stop356

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