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

3 codes

0x80070569Warning

ERROR_LOGON_TYPE_NOT_GRANTED

A user has been denied the requested logon type at this machine. Check local/GPO logon rights.

AD / Kerberos-2147023255

0x80070774Warning

ERROR_ACCOUNT_LOCKED_OUT

The referenced account is currently locked out and cannot be logged on to.

AD / Kerberos-2147023244

0x80090317Warning

SEC_E_TOKEN_TOO_LARGE

The security token exceeds the maximum allowed size. Too many group memberships — Kerberos token bloat.

AD / Kerberos-2146893033