i bought this mac about 3 weeks ago. i am very new to mac and my mac savy friend is out of town and i cant get ahold of him. i was online today + used vlc to show a movie clip to a friend. also used audium. i went to shut my computer down and after 10 minutes i realized my laptop is still on. just the wall paper and the bottom bar where all the application icons are. NO FINDER OR APPLE TAB. my friend told me i can never turn off the finder application. every time i go to open the finder (because thats the only way i can access the apple tab) and shut down my computer i keep getting error messages about applications not being able to close (all my applications are shut down). then again, my finder quits on it own. please help.