Find out what an error code means and what to try.

Type a code in any form (hex, decimal, signed, with or without 0x), a symbol name, or words describing the symptom.

Start with the problem area

NetworkingSockets, HTTP, proxies and name resolution
310 codesRPC and COMRPC runtime and DCOM
117 codesServicing and component storeCBS, SxS and DISM: the component store and update installation
113 codesWindows Installer (MSI)Installer service and package errors
50 codesDisks and storageDisk, volume and file-system errors
23 codesSecurity and authenticationSSPI, Kerberos, NTLM and access errors
8 codesWindows UpdateWindows Update agent, scan, download, install and the update handlers
3 codesBackground Intelligent TransferBITS download jobs, used by Windows Update
1 codeCertificates and trustCertificate validation, trust chains and cryptography
0 codes

Codes with solutions

CBS_E_STORE_CORRUPTION0x800F0831
3 solutionsERROR_FILE_CORRUPT0x80070570
2 solutionsERROR_FAIL_REBOOT_REQUIRED0x80070BC9
2 solutions0x80072EFE0x80072EFE
2 solutionsERROR_PATH_NOT_FOUND0x80070003
1 solution0x800700080x80070008
1 solutionERROR_INVALID_DATA0x8007000D
1 solutionERROR_NOT_FOUND0x80070490
1 solution0x800705AA0x800705AA
1 solution0x800706BE0x800706BE
1 solution0x800706D90x800706D9
1 solution0x80071A910x80071A91
1 solution

By code type

Win32 system error codeError numbers from GetLastError() and most Win32 APIs (winerror.h, 0-15999).
2,851 codesHRESULTA 32-bit result used by COM, Windows Update, servicing, BITS, ConfigMgr and most newer Windows components.
29 codesNTSTATUSKernel and native-API status codes (ntstatus.h); seen in bug checks, event logs, setup and servicing logs.
0 codes

A solution says "verified here" only after someone logs that it fixed a real machine. Until then it is imported and untested.