After successful authorization, a dialog box will appear and indicate that how many devices you have authorized out of available 5.Enter your Apple ID and password, and then click Authorize.To make menu bar displays permanently, select the Menu icon in the upper-left, and then select Show Menu Bar. Or you can press Alt + S to directly open the Store mneu. Note: The menu bar is hidden by default in Windows 7 and Windows 8. Click on the Store on the menu bar, then select Authorize This Computer.You must authorize this computer before you can download past purchases on it.” If you attempt to download or play a past purchased content such as music or video, or use Home Sharing, or use the Automatic Downloads setting on a computer which has not been authorized, you may get error messages such as “Your computer is not authorized.
The license of iTunes Store officially allows users to authorize and play the purchased content from iTunes Store on up to five computers at a time. To do so, you will need to authorize the PC or Mac and link the computer to your Apple ID.
User can sync and use all content that he or she purchased from iTunes Store on Windows PC or Mac OS X machines. Apple’s iTunes Store has grown from an online music store in iPod era to one-stop online marketplace for digital entertainment, selling contents ranging from music, movies, TV shows, music videos, ringtones, books, audiobooks, and applications. With the popularity of iPhone, iPad, iPad mini and Mac OS X systems, and previously the iPod, many people has now purchased and owned media content on the iTunes Store.