Don't ever use the Windows key? Or don't like where it's at and want to swap it with Alt or Ctrl? Download a keyboard remapper--many cheap or free apps are readily available, but the simply-named Keyboard Remapper works well.
Remap to your heart's content, but keep in mind there's no way to change or disable a laptop's Fn key, since it bypasses Windows. (You can also check your computer's BIOS for any potential tweakability.)