Q: How do I remove the app store update notification?

I have update notifcations appearing on my App Store icon, and also (very annoyingly) constantly popping up as notifications on screen all day long (I keep clicking them away every time). I've tried to update the apps (no pirates) and the App Store tells me to sign in to do this. I sign in, then it says I need to sign in using the details I used to purchases the apps. But the apps came with the purchase of my MacBook (iPhotos, iMovies and Pages), not via an Apple ID. Can anyone tell me how I update these, or get rid of the pop-up notification?