preloaded iPhoto seems to be damaged.

I just noticed that iPhoto has a circle and line through it. I looked inside the package and all that was in there was some music files in contents>resources>music, nothing else. No app, nada.

This was a refurb iMac and it came with Lion already installed so there are no install disks.

I think there is a restore partition that contains the OS somewhere on the HD, but I'm not sure 1. how to get into it and 2. if it has the apps on it.

I was wondering what I should do in order to reinstall iPhoto 11.

thanks.