Hi, this morning I recieved a popup saying that there was an update availble. So I downloaded the update and ran it. However, I got the message saying that the update could not be installed. So I closed the update box. I then tried to open the sys prefs and it wouldn't open, I tried safari and it wouldn't open either. So I tried a reboot. However, when I try to reboot, it gets to the screen with the apple and the circle which spins and stays there with the circle spinning. It has stayed there since this morning. What do yuo guys suggest? I've got work on the desktop which I kind of need and hope I can keep it. Thanks in advance, Daniel.