Hello,
- May I please know where you're getting this error?
- Are you trying to install or uninstall a Specific program on your device?
- Can you share a screenshot of the error message here for reference?
Meanwhile, ensure you have installed all the latest updates for your PC.
- Go to Start > Settings > Windows Update> Check for Updates.
- Download and install all the available updates.
If your PC is up to date, open Command Prompt (Administrator).
Run these two commands one by one.
msiexec /unregister
msiexec /regserver
Running these two commands will unregister and then re-register Windows Installer.
See if you can uninstall or install the program afterwards.