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I ran the update and the prompt said it was complete and to restart. I have a kvm switch and it was set to the other computer during the update. The updated machine did not recognize the mouse or keyboard. So, I "pulsed" the power switch to restart it. Upon restart the system would not boot. Is there a way to recover this system without a complete redo?

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In what way does your computer "not boot"? I can think of lots of possible ways that could happen and I don't know which one might be happening to you. – irrational John May 21 '12 at 1:50

Run the Recovery Mode from the boot menu (the list of operating systems, looks like the screenshot below). Hope it'll do the trick.

screenshot of GRUB v1.98 boot menu

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