Security Update Package Installer 3.3.2 release notes

September 23, 2025

🆕 New features

Remove/replace dependency on the U-Series Authentication Service

Removed code dependencies on an older service that managed internal authentication calls.

Digitally sign CAB files and Powershell scripts used in SUPI

SUPI packages are digitally signed and validated by the SUPI engine before being run.

Restore WUSA installation of MSU files instead of workaround

A workaround to handle sub-installers was removed and replaced with a more modern approach..

There are no enhancements in this release.

Issue	Resolution
Files being deleted that should remain	Updated to be less aggressive when deleting files that are currently being processed.
c:\Appliance\Updater\ folder exists with the original files after upgrading	Cleaned older directories on upgrading.