This error typically occurs when the application being installed was already uninstalled. Before attempting troubleshooting, launch the Battle.net Desktop Application and check the blue button on the game tab. If the button says Install, the game was already uninstalled. If it says Play, or you receive this error with the Battle.net Application itself, follow the steps below.
- Reinstall the Battle.net Application to repair any corruption of the installer.
- Troubleshoot any security programs, which may be preventing the uninstaller from starting.
- A corrupted administrator account can cause permission errors with the Battle.net Application. Create a new administrator account.
- If the issue persists, exit the Blizzard Battle.net desktop app and uninstall the game manually.