On a computer, open a web browser and navigate to the iTunes website (http://www.apple.com/itunes).
Under Download iTunes, check the preferred options and enter a valid Email Address.
Click Download Now.
Note: System compatibility requirements are listed beneath Download Now.
If prompted, click Run.
Note: Options presented may vary depending on the computer operating system.
Once the iTunes setup wizard is launched, click Next.
Click to check or uncheck options.
Click Install when finished.
Note: If a User Account Control prompt appears, click Yes. Options presented may vary depending on the computer operating system.
iTunes is now installed a ready to use.