0x0000066F
ERROR_UNKNOWN_PATCH
The update is not applied to this product.
win32decimal 1647Windows Installer (MSI)
Matched as: the code as given (hex)
Log a case with no specific solution
Source: System Error Codes (1300-1699) - Win32 apps · CC-BY-4.0 (MicrosoftDocs/sdk-api, repo license verified 2026-10-09) · retrieved 2026-10-09