A window is an area on your desktop within which all Windows-based programs run. Windows XP, Vista or Windows7 is an Operation System that is a window based programs.
Operating systems control the functions performed by a computer. For example, the operating system on your computer controls the input from the keyboard and mouse to your computer, the opening and closing of programs, the transfer of information to a printer, the organization of the files on your computer, and the screen display. To function, every computer must have an operating system. Windows XP and Windows Vista is an operating system. Windows XP, Windows Vista or Windows7 comes in several versions: Home Basic, Home Premium, Business, Ultimate, and Enterprise. The features available to you depend on the version of Windows XP, Windows Vista or Windows7 you have. You must note that there is a different between window and windows operation system.