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SQL Server Launchpad service fails to start after installing Windows updates

Symptoms

You're running a Windows 11 machine with SQL Server installed with the SQL Server Machine Learning Services feature. After installing Windows update KB5044284 (OS Build 26100.2033) or a later version, you notice the SQL Server Launchpad service fails to start. After checking the ExtLaunchErrorlog file, you see the following error messages at the end of the file:

<timestamp>	Security Context Manager initialization failed. ErrorCode: 0x8032000c.
<timestamp>	Satellite Session Manager initialization failed. ErrorCode: 0x8032000c.
<timestamp>	Initialization of satellite session manager failed. ErrorCode: 0x8032000c.

Note

This issue doesn't impact Windows Server operating systems.

Cause

Windows update KB5044284 (OS Build 26100.2033) changed the behavior of the Windows API CreateAppContainerProfile that is called by the Launchpad service. This change causes the API to return an error, ultimately leading to the failure of the Launchpad service.

Resolution

Microsoft is actively working on a fix. In the meantime, if you use the Launchpad service, revert to Windows update KB5043080 (OS Build 26100.1742) or an earlier version.