Not sure what is going on there.
Did the startup look normal? Was the spinning cart wheel on the screen for longer than normal?
When you say Task Bar, are you referring to the Dock or are you running Windows on that Intel Mac?
Hey, I am running one of the new Intel iMacs and i have had no trouble at all until today. I turned it on and all my taskbar settings, background and what not had been reset and some of my picture files and music files had completely disappeared. Can anyone tell me what happened?