I have a 2006 MacBook version 10.6.8 w 2GHz Intel Core Duo. When using MS Office - Exel, it often freezes, needs to be Force Closed, and reopened. Very annoying as I lose a lot of work every time. I have had one document that has 5 Versions! My Dock sometimes freezes as well. Again, I have to Force Close and restart. Aaaarg! Any suggestions? BTW - I am NOT tech-savvy, so explain it to me like I am 6!