iTunes

Windows System Requirements

• PC with a 1GHz Intel or AMD processor and 512MB of RAM
• Windows XP Service Pack 3 or later; 32-bit editions of Windows Vista, Windows 7 or Windows 8
• 64-bit editions of Windows Vista, Windows 7 or Windows 8 require the iTunes 64-bit installer
• 400MB of available disk space
• Broadband Internet connection to use the iTunes Store

Or 

http://www.apple.com/in/itunes/download/