Hello.. I am trying to update on my Macbook pro 2.66 ghz i7 8gb ram .. I press restart computer and install updates once software update instructs me to but the computer does not restart. This led me to also realize that if I click the apple in the top left of the screen none of the commands: log out, restart, shutdown will work. I currently have to hold down the power button and force power off.. Any ideas or help??