To fix You do not have sufficient privileges to install the program error when installing software on Windows 11/10 follow these suggestions.

We have some users who need access to our terminal servers but they are travelling and using the computer systems on our partners sites. Lately they've been on several sites still using Windows ...

Of course such environments are also precisely the sort of places where users can't install their own software, which is why Google has eliminated the need for admin rights to install Chrome Frame.