Updates after reinstalling OSX

Hello. I brought my MBA 13" mid 2011 to an apple store to change the cracked lcd. They reinstalled me the OSX Mountain Lion verision 10.8 for another problem, correlated to my user account. When I was home, i tried to update my mac via Mac App store, but it don't find any kind of that. I update it manually via the download section of apple.com at the version 10.8.2, but it still don't find any other updates, like printer drivers.

What can i do to fix it, without bring it an other time to an apple store?

Thank you

Giorgio