Updating the iLife suite on a pre-installed MacBook Pro

Launch the App Store and sign into your account. Goto the "Purchases" tab. There the iLife apps should be waiting for you to be accepted.

1. Double-click the App Store icon in the dock.
2. Enter your Apple ID and password.
3. Click Purchases.
4. If you haven't previously accepted your bundled iLife applications within the Mac App Store, you should see your iLife applications appear in the Accept portion of the screen. Click Accept.
5. You may be asked for your Apple ID and password once again. Your iLife applications now move to the Purchased section. These applications are part of the software that came with your Lion based computer. Your account will not be charged for them. Click Install to complete installation of your applications.

See this Support article, the section on:

Restoring iLife applications after Internet Restore of OS X Lion or OS X Mountain Lion

http://support.apple.com/kb/HT4718

Regards

Léonie

You need to sign into the App Store with exactly the same Apple ID that you used when you set up your Mac and accepted the iLife apps. Can it be that you bought your Mac second handed and the previous owner accepted the iLife package already? Than you cannot accept them to your name.

Have you moved the iLife Apps from your Applications folder to another folder? That may explain why the App Store does not recognize them.

What are the versions of your iLife Apps and what version of MacOS do you have?