After changing for Windows 11, my application cannot create a user instance SQL Server due to a failure to start the process for the instance user

Marcel Duboué 20 Reputation points
2023-09-02T17:58:13.3533333+00:00

Hello,

I already post my question at the tag SQL Server; after 2 weeks of work, they thing that the problem is due to the fact that my old application Visual Studio uses User Instances, which, for them is an old feature.
The message delivered is

User's image

And the beginning of the code, trying to open the first DB is

User's image

Please tell me your diagnostic, ans possibly any solution to recover my application

Thank you

Windows for business Windows Client for IT Pros User experience Other
SQL Server Other
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