Anything is `Program Files` is not writable by default by a non-admin user. The idea is that you can't change an installed application or add additional executable code to an installed application.

You can change permissions on the folder to add `INTERACTIVE` or your specific user account to allow full access (or whatever permissions you need).

Frankly there's no good reason you should write anything into the FoxPro installation folder.

+++ Rick ---

>Even thou I have done this before, by accident, but how do I make the "C:\Program File (x86)\Visual FoxPro 9" and sub-folders Read-write.
>
>I have tried change the Read-Only option in the folder's Properties dialog. It indicates that the R/O is Off, but the files remain still inaccessible for writing.
>I am thinking it may some kind of permission issue, but I rarely mess with that, so I reluctant to play around in that unless I have the proper instructions.
>
>FYI: I have Windows 10 Pro.
>Thank you, in advance.