1. Uninstalling WIN-911 

This KB Article will guide you through the steps on how to cleanly uninstall WIN-911 2021. This is useful if you are experiencing issues with the WIN-911 SQL Database or if the computer-name was changed, maybe the computer was added to a domain, or the user account name was changed. These symptoms could potentially affect the integrity of WIN-911 and might require a fresh re-installation of WIN-911.

If you prefer to restore from database backup then we suggest to review the instructions on our Knowledgebase on How To Backup and Restore WIN-911.

A. Procedure

1. Log in to Windows with an administrator account.

2. Run WIN-911 Uninstaller.exe, this executable is located in the original WIN-911 installation files under the Tools folder. If you do not see WIN-911 Uninstaller.exe in Tools, you may have an older version.

NOTE: Before proceeding, be sure that WIN-911 Uninstaller.exe removed WIN-911 successfully. If WIN-911 Uninstaller hangs or stalls, it is recommended that the user exits the WIN-911 Uninstaller application from Task Manager and try again. 



3. Open Control Panel > Programs & Features

4. Select SQL Server 2019 (64 bit) via Control Panel > Programs & Features and click Uninstall/Change


NOTE: If you previously installed SQL Server 2017, then select Microsoft SQL Server 2017 (64-bit) instead. The rest of the instructions should remain the same.

5. Click Remove on the SQL Server 2019 Window





6. On the Select Instance Window: Choose WIN-911 in the drop-down menu called Instance to remove features from and click Next.



7. On the Select Features Window select WIN-911, which should also highlight Database Engine Services, SQL Server Replication, and Full-Text and Semantic Extractions for Search.

NOTE: It's is not recommended to select Shared Features because this could potentially affect the SCADA installation.


8. On the Ready to Remove prompt – click Remove


        9. On the Complete Window - click Close to close the window.



10. Open Windows File Explorer and browse to C:\Program Files\Microsoft SQL Server and manually delete the MSSQL15.WIN911 folder

NOTE: If you plan on restoring from backup, then we highly recommend to copy & paste this folder to a temp location before deleting this folder.




If you followed these steps correctly, you should have successfully uninstalled WIN-911 Enterprise. You can now safely install a fresh copy of WIN-911 Standard, Interactive or Advanced license. 

Technical Support

To create a support case, you will need either your Customer Care Code or your Serial number. You can create a Case online or contact the product support line: (512) 326-1011.