As stated from http://www.advancedinstaller.com/requirements.html,
it is recommended using Windows 7 rather than Windows XP SP3.
Actually what are the differences of using Advanced Installer between using these two platforms?
The Advanced Installer application have a better user interface (using the Aero theme) on Windows 7 operating systems. Also, the classic menu bar was replaced with a more user friendly ribbon control.
Also, you can search the Internet for differences between Windows XP, Vista and 7 to get a clear view on the operating system versions.