I've tried everything you've guys told me. 2 out of every 3 of my Applications such as PhotoBooth, Itunes, etc will just stop responding every 2 or 3 days. It's annoying. Please I need one last effort from you guys to help me before I take it in to Apple and get a full restore. I already tried the following: Restoring permissions Using Cocktail for Firefox Sweeping for viruses. HELP!