Starting with Windows Vista, the 64-bit versions of Windows have two Program Files folders. The regular Program Files folder holds 64-bit applications, while "Program Files (x86)" is used for 32-bit ...
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 to ...