My Mac Book Pro does not recognize the presence of a DVD or CD
Ever since I upgraded my MacBook Pro, it does not recognize a DVD or CD of any type when I put it in. I have a store bought DVD, the Social Network, which worked fine before upgrading to OSX operating system. Music CD's were okay then, too. Now, neither is even recognized by the player. Thought maybe it needed to be reloaded, but na't figure out how to do that. This is very frustrating, and makes me start to second guess my decision to switch to an Apple product. I've only hd this computer about 18 months, did the upgrade last September (?) and have had difficulties ever since. HELP me please!!!
MacBook Pro, iOS 6.1.2, using OSX