Folder Guard is for Windows 8, 7, Vista, XP, and similar versions of Windows. Windows Server 2003 and later are also supported. Both the 32-bit and x64 editions of Windows are supported. Folder Guard is NOT compatible with Windows RT, Windows 95, 98, Me, Windows NT, Windows 2000, or any older version of Windows.
There are no special requirements or recommendations except the obvious one: the better processor and more RAM your computer has, the better Folder Guard will perform.