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Werk #19222: Windows agent: fix post-install flag handling during auto update

Component Checks & agents
Title Windows agent: fix post-install flag handling during auto update
Date Jul 15, 2026
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed
Checkmk versions & editions
2.5.0p10 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT

The Windows agent installer did not correctly set and clear the post-install flag due to reading MSI product information from the wrong registry location. This caused the automatic update process to malfunction, and in particular could complicate updates of the Python module.

Starting with this release, the installer reads MSI information from the correct WOW6432Node registry path, ensuring the post-install flag is properly managed and the auto update process works as expected.

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