Once you have the .diagcab file (even if it came in a .zip or .rar archive): Microsoft Program Install and Uninstall Troubleshooter

You can check the Official Support Page for the latest troubleshooting advice.

The tool you're looking for is officially called the . While users sometimes search for "meta rar" versions, the genuine file from Microsoft is typically a .diagcab file.

If the built-in Windows tools don't work, you can still find the original utility on official support pages and verified archives:

Sites like TenForums and MajorGeeks often maintain archived versions of the MicrosoftProgram_Install_and_Uninstall.meta.diagcab file. How to Use the Utility