Each time Apple releases an iTunes update, new features and bug fixes are added to the software--and you'll almost always want the latest and greatest. The process of updating iTunes is pretty simple. Here's how to do it.
Begin by using the built-in Software Update tool that comes with iTunes.
On a Mac, you'll find that by clicking the Apple menu in the top right corner of the screen and selecting the "Software Update" menu item. You can also select "Check for Updates" from the iTunes menu.
On a PC, go to the Help menu and click "Check for Updates."