Core component of SQL Server for storing, processing, and securing data
The summary shown is only telling that the patch failed. The next step is to identify why the SQL Server service did not start during patching.
Use this path:
- Open the setup log folder for this failed attempt:
C:\Program Files\Microsoft SQL Server\160\Setup Bootstrap\Log\20260902_072017\ - Review
Summary_NADL251702_20260902_072017.txtand search for error or failed. The summary file is intended for that first pass. - Then check the SQL Server error log for the instance because setup specifically relies on that when Database Engine startup fails:
C:\Program Files\Microsoft SQL Server\MSSQL16.PRIMTECH\MSSQL\LOG\ERRORLOG - Verify the SQL Server service startup configuration and credentials:
- Confirm whether the SQL Server service startup type is Automatic or Manual.
- Verify the service account and password are valid and not expired.
- If the
ERRORLOGcontains a message like:
There have been 256 misaligned log IOs which required falling back to synchronous IOthen this matches a known Windows 11 disk sector size issue that can prevent SQL Server from starting.
Important note: if the issue is the Windows 11 disk sector size problem, the documented guidance is to use the published workaround for that condition. Also, if setup failed to complete configuration, uninstalling the instance and then running setup again after applying the fix is the simpler path.
If the summary log for the upgrade contains this exact message, repair is supported:
SQL Server upgrade failed. To continue, investigate the reason for the failure, correct the problem, and then repair your installation.
If the summary log instead contains this exact message, repair is not supported and uninstall/reinstall is required:
SQL Server upgrade failed. To continue, investigate the reason for the failure, correct the problem.
For this case, the most useful file to inspect next is ERRORLOG under the PRIMTECH instance log folder.
- Troubleshoot SQL Server errors related to system disk sector size greater than 4 KB
- View and read SQL Server Setup log files
- SQL Server service may not start after patch installed
- Repair a failed SQL Server installation
- Wait on the Database Engine recovery handle failed - Microsoft Q&A Overall summary:
- SQL Server Express 2022 - SQL Server service is not starting on Windows 11 system. - Microsoft Q&A