I manually deleted an application's program files, but Windows keeps trying to repair or reinstall it in the background. The application no longer appears in the installed-apps list, and there are now around 50 GB of MSI files associated with it in C:WindowsInstaller. Is there a safe way to remove these files without deleting them directly from the Installer folder?
3 Answers
If you can identify the MSI package that belongs to the application, use it to repair or restore the installation, then run the application’s uninstall process. Simply deleting all the MSI files could prevent other programs from being repaired or uninstalled later.
Avoid manually deleting anything from system folders. Run Disk Cleanup or Windows storage cleanup for items Windows has marked as removable, and uninstall unused software through its own uninstaller. If the installer database is badly damaged and the files are taking up extreme amounts of space, a clean Windows installation is the most thorough option, though it should be a last resort.
Don’t delete files directly from C:WindowsInstaller. Windows uses those MSI packages for repairs, updates, and future uninstalls, so removing them can leave broken installer records. Since the program files were deleted manually, try repairing or launching the matching MSI first, then uninstall the application through its normal uninstaller. A reputable cleanup tool may also help identify the orphaned installation, but review everything carefully before removing it.
I removed the files manually because the program didn’t appear in the installed-apps list. It was some unwanted school monitoring software, but I’ll try using an uninstaller tool to find the leftover entry.