ERROR_PATCH_TARGET_NOT_FOUND 0x8007066A

Error code 1642 · HRESULT 0x8007066A

WINDOWS

The upgrade cannot be installed by the Windows Installer service because the program to be upgraded may be missing, or the upgrade may update a different version of the program. Verify that the program to be upgraded exists on your computer and that you have the correct upgrade.

Windows troubleshooting diagram: Device Manager warning and a system file scan
Windows errors: check drivers, system files and Event Viewer, in that order.

What it means

ERROR_PATCH_TARGET_NOT_FOUND is a Windows error code (system error 1642, returned as HRESULT 0x8007066A) reported by Windows. Its official message is: “The upgrade cannot be installed by the Windows Installer service because the program to be upgraded may be missing, or the upgrade may update a different version of the program. Verify that the program to be upgraded exists on your computer and that you have the correct upgrade.”

How to fix ERROR_PATCH_TARGET_NOT_FOUND

  1. Run the Windows Update troubleshooter (Settings → System → Troubleshoot → Other tools)
  2. Reset update components: stop 'wuauserv' and 'bits', clear C:\Windows\SoftwareDistribution, restart both services
  3. Verify system file integrity with 'sfc /scannow'

Related errors

ERROR_PATCH_PACKAGE_REJECTEDERROR_PATCH_REMOVAL_UNSUPPORTEDERROR_PATCH_PACKAGE_UNSUPPORTEDERROR_PATCH_NO_SEQUENCEERROR_SUCCESS_REBOOT_INITIATEDERROR_INSTALL_REMOTE_DISALLOWEDERROR_INSTALL_TRANSFORM_REJECTED

Source: Microsoft WinError.h

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