The first thing that you need to do is to turn on your computer. Wait for the operating system to boot. Once it is finished loading, you will see the desktop appear on the screen. Make sure the Internet is working properly. You can check this by launching the Web browser and opening some website such as Google or Facebook. If you have some downloading program such as uTorrent running in the background automatically, exit it for the time being to free up bandwidth and utilize it to update iTunes faster.
Look for the iTunes icon on the desktop and double-click it to launch it. If you do not see the icon on the desktop, click on the start menu button in the bottom-left corner of the screen to bring up the main menu. Place the mouse cursor on “All Programs” to display the list of programs that are installed on your system. Scroll down the list until you see iTunes. Click it once to launch it.
Once you have launched iTunes, locate click on the “Help” menu to display a list of options. Look for the “Check for Updates” option and click it. Wait for a few second as the program quickly searches the Apple online database for available updates. If updates are available, the Apple Software Update” window will appear on the screen.
Look for the iTunes update on the new window and see if the box next to it is checked. If it is not, click on it to select it. If you have other Apple programs installed on your computer such as the Safari Web browser or MobileMe, you may see available updates for them as well. If you do not wish to update them at the same time as iTunes, deselect them by unchecking the box in front of them.
Begin the update by clicking on the “Install” button. The update will first download and then automatically install. The process may take some time to complete, depending on the speed of your Internet and the size of update.