Article - CS352356
Unable to launch ThingWorx Installer to upgrade with error "previous installation of ThingWorx Foundation has been found. Uninstall the existing installation and then reinstall"
Modified: 16-Feb-2026
Applies To
- ThingWorx Platform 9.1 to 10.0
- Microsoft SQL Server
- PostgerSQL
Description
- Cannot run ThingWorx installer to upgrade with error:
A previous installation of ThingWorx Foundation for MSSQL has been found. Uninstall the existing installation and then reinstall ThingWorx Foundation for MSSQL. If you are upgrading ThingWorx Foundation, you must first ensure that all prerequisites are met. Do you want to review the prerequisites in the help center now?
- All prerequisites have already been met, yet the installer still prompts for prerequisite verification
- How to perform an in-place upgrade with new user account
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