Both Windows Xp and Windows Vista are simple, easy to use and user friendly operating systems. It depends on the user if he or she is actually habituated with the windows platform from microsoft. The basic structure and interface of almost all the windows operating system is similar. The difference is in the looks, and features. Vista is little more flashy and feature rich in terms of Windows XP. But is very hardware demanding. Also a number of functions and settings in vista has been made more user friendly. It all depends on your use. And the more you explore in either of the operating systems the more you get comfortable with it and so more easier will it be for you to use.