0x00003D06

ERROR_INSTALL_PACKAGE_DOWNGRADE

The package could not be installed because a higher version of this package is already installed.

win32decimal 15622Windows Installer (MSI)

Matched as: the code as given (hex)

Log a case with no specific solution

(Enterprise subscription only)

Source: System Error Codes (12000-15999) - Win32 apps · CC-BY-4.0 (MicrosoftDocs/sdk-api, repo license verified 2026-10-09) · retrieved 2026-10-09