If I wanted my screen to freeze every other day I would have bought a crappy PC. I bought my hugely expensive MPB late 2010. I have added no apps, no games, no heavy programs. The screen of my MBP keeps freezing when the internet is on. This happens 3-4 times a week. When it happens I can still move the cursor but nothing happens. Sometimes when the screen is frozen I click the dim button and it can take 5 minutes before it dims. If I am playing a tune on youtube the tune carries on playing to the end. I was told this is a memory problem. The Apple geniuses carried out a test and said everything was fine. Well, it is not. I have now force quit my laptop over 100 times. Any suggestions?