Windows Update Error Codes and Solutions

Windows Update errors can be disruptive and confusing. Below is a list of common Windows Update error codes, along with their messages and descriptions, followed by suggested troubleshooting steps.

Automatic Updates Client Errors

0x80243FFF: WU_E_AUCLIENT_UNEXPECTED

  • Message: There was a user interface error not covered by another WU_E_AUCLIENT_* error code.
  • Solution: Try restarting the Windows Update service and check for updates again. If the problem persists, consider running the Windows Update Troubleshooter.

0x8024A000: WU_E_AU_NOSERVICE

  • Message: Automatic Updates was unable to service incoming requests.
  • Solution: Ensure that the Windows Update service is running. Check network connections and firewall settings that might be blocking access to Windows Update servers.

0x8024A002: WU_E_AU_NONLEGACYSERVER

  • Message: The old version of the Automatic Updates client has stopped because the WSUS server has been upgraded.
  • Solution: Update your Windows Update Client to the latest version. If using WSUS, ensure client-side compatibility.

0x8024A003: WU_E_AU_LEGACYCLIENTDISABLED

  • Message: The old version of the Automatic Updates client was disabled.
  • Solution: Enable or reinstall the current version of the Windows Update client. Ensure it’s not disabled by group policy.

0x8024A004: WU_E_AU_PAUSED

  • Message: Automatic Updates was unable to process incoming requests because it was paused.
  • Solution: Unpause or restart the Windows Update service and try updating again.

0x8024A005: WU_E_AU_NO_REGISTERED_SERVICE

  • Message: No unmanaged service is registered with AU.
  • Solution: Register the service with Automatic Updates or check for a misconfiguration in the service settings.

0x8024AFFF: WU_E_AU_UNEXPECTED

  • Message: An Automatic Updates error not covered by another WU_E_AU* code.
  • Solution: This is a generic error. Try resetting the Windows Update components manually or running the Windows Update Troubleshooter.

Installation and UI Errors

0x80243001: WU_E_INSTALLATION_RESULTS_UNKNOWN_VERSION

  • Message: The results of download and installation couldn’t be read from the registry due to an unrecognized data format version.
  • Solution: Check for corruption in the registry settings related to Windows Update and consider using a registry cleaner or manual repair.

0x80243002: WU_E_INSTALLATION_RESULTS_INVALID_DATA

  • Message: The results of download and installation couldn’t be read from the registry due to an invalid data format.
  • Solution: Similar to the above, ensure the integrity of registry settings and consider resetting or repairing them.

0x80243003: WU_E_INSTALLATION_RESULTS_NOT_FOUND

  • Message: The results of download and installation aren’t available; the operation may have failed to start.
  • Solution: Retry the operation. If it repeatedly fails, use the Windows Update Troubleshooter or manually reset Windows Update components.

0x80243004: WU_E_TRAYICON_FAILURE

  • Message: A failure occurred when trying to create an icon in the taskbar notification area.
  • Solution: Check for issues with the notification area settings or with the user profile. Consider creating a new user profile as a test.

0x80243FFD: WU_E_NON_UI_MODE

  • Message: Unable to show UI when in non-UI mode; Windows Update client UI modules may not be installed.
  • Solution: Ensure that all necessary Windows Update UI modules are installed and that the service is not running in a non-interactive service window.

0x80243FFE: WU_E_WUCLTUI_UNSUPPORTED_VERSION

  • Message: Unsupported version of Windows Update client UI exported functions.
  • Solution: Update the Windows Update Client to the latest version and ensure all system files are intact and not corrupted.

0x8024043D: WU_E_SERVICEPROP_NOTAVAIL

  • Message: The requested service property isn’t available.
  • Solution: This may involve more in-depth troubleshooting, including checking service configurations and dependencies. Consider seeking specialized technical support.

When facing any Windows Update error, it’s also advisable to keep your system backed up, ensure all drivers are up-to-date, and consider any recent changes to your system that might have precipitated the issue. If all else fails, seeking support from Microsoft or a professional technician might be necessary.