Software Update: Stopping halfway through the process
I have osx lion and have had my macbook pro 13 for about two years. For some reason in the past couple of days my mac wont update. I go to the apple sign > software update and let the process run. But now for some reason the progress bars stops halfway through the process and doesnt move. I let it sit there over night and still nothing. Tried several different techniques including one posted by someone else who had a exact screen shot of what I am talking about but he never got a full answer as how to fix it. Plain and simple >>> how do I fix this problem so I can update? Yes I know I can just go to apple.com and update from there but I have no clue as what I am supposed to be updating.
MacBook Pro, Mac OS X (10.7.4)