On computers that run a 64 bit Windows (XP64, Vista, and Windows 7), Program Files is for 64 bit programs like Vue 6 Infinite 64 bit and higher versions. 32 bit code will not run from this folder. You have to install to Program Files (X86), which will automatically invoke WoW (Windows on Windows) 32 bit emulator.

Both of these folders are secure under Vista and Windows 7. This means that all user content must be outside of those folders, usually under My Documents.

In Linux and UNIX, there is the /user partition where all of each user's stuff goes. I would imagine there is something similar in Mac OS X, which is a BSD UNIX.