There is a good reason Program Files is a protected folder. Source: What’s the Difference Between the “Program Files (x86)” and “Program Files” Folders in Windows? Just let your programs automatically decide which Program Files folder to use. Both 32-bit and 64-bit programs should store your data in folders like AppData and ProgramData, and not in any Program Files folder. Programs appear in the Start menu and function normally, no matter where they’re installed.
Windows automatically installs programs to the correct folder, so you don’t have to think about it. It doesn’t normally matter whether a program’s files are stored in Program Files or Program Files (x86). Case in point, while it's possible to store all users profile data on another drive, it really isn't supported by Microsoft. Programmers can be extremely lazy, we have a habit of doing what is recomended by Microsoft, so when anyone does something that is possible on Windows but not official supported we don't really test our application's compatability with that action. If you choose to install all your applications in a single directory, that isn't Program Files, is entirely up to you.
64-bit programs still use the normal Program Files folder. When you run a 32-bit program on a 64-bit edition of Windows, the WOW64 emulation layer seamlessly redirects its file access from “C:\Program Files” to “C:\Program Files (x86).” The 32-bit program tries to access the Program Files directory and is pointed to the Program Files (x86) folder. Likewise, a 64-bit application, will also see a Program Files which contains 64-bit applications. In other words, when dealing with a 32-bit application, Program Files (x86) will appear to be Program Files on a 64-bit version of Windows. Program Files is also special in that, if you are running a 32-bit or 64-bit version of Windows, what the application sees is identical. Should I install 圆4 bit games on C:\Program Files (x86), C:\Program Files or C:\Games\GameFolder?
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