Using Software Update for Windows to keep your Apple software up-to-date
On a Microsoft Windows XP, Windows Vista or Windows 7-based PC, you can use Apple Software Update for Windows to keep your Apple software up-to-date via the Internet. Apple software includes Safari for WIndows, iTunes for Windows, Bonjour for Windows, and QuickTime for Windows.
Bonjour for Windows, QuickTime for Windows, Safari 4 (Windows), Safari 5 (Windows), iTunes 7 for Windows
Installing Apple Software Update
If you don't already have Software Update for Windows, it can be installed by downloading and installing iTunes for Windows, QuickTime for Windows, or Safari for Windows.
When installing, in the Installer Options window, be sure that "Install Apple Software Update to easily update iTunes and other Apple software" is checked (enabled).
Using Apple Software Update
To use Software Update for Windows, click the Start menu and select Apple Software Update. Available updates will be shown. Click Install to download and install them.
If no new updates are available, a dialog appears stating "Your software is up-to-date."