Missing iPhotoq

I know "it's easy", BUT , first it began with a missing iPhoto which Apple Care fixed , but Word (Microsoft ) had disappeared and I couldn't find the license...then, one month later Word comes back and (you guessed it, ) iPhoto disappears again....
Any ideas out there? (I'm on Montain Lion on a MacPro.version 10.8.5
cheers,
me

Where do these apps disappear from? When they disappear, can you find them using Spotlight (the magnifying glass in the top right corner of your screen)?

Hi,
I've tried that, but nilch.
I'm calling Apple Care tomorrow...
Thank you anyway.
me