After running 64-bit Vista for a week or so, and realizing I had no reason to be running it, I did an in-place installation of 32-bit Vista. It moved the Program Files, Windows, and Users folders ...

By terminating them, I was able to delete the 'Microsoft' folder in Program Files (x86). In addition, many folders in the 'WindowsApps' folder in Program Files are also deleted.

After uninstalling a program, you can use the following effective ways to remove leftover files of the program on a Windows 11/10 computer: Check the Program Files or Program Files (x86) folder ...