failed update to 10.9.1

This morning I updated from 10.6.8 to 10.9.1. Initially, the process appeared to be successful. After the system finished installing, it rebooted my MacBook Pro, with normal results. Next, I recalibrated my monitor.

After that, I updated SKitch from the App Store.

Next, I tried downloading the updates for Keynote, Numbers and Pages. This procedure din't progress, so I restarted the computer. WHen reboot started, I got the grey screen, and nothing else, no Apple logo, no spinning gear, no progress bar.

I called Tech Support and they had me restart in Safe mode, but that failed. Then they had me do Command-R after hitting the Power Button, and I ran Disk Utilities. The repair said that the drive is fine. At the bottom of the First Aid panel, the notices said:

"The volume hadar appears to be OK.

Volume repair complete.

Updating boot support partitions for the volume as required." The last notice never changed, even after waiting for more than a half hour.

Upon Restart, the computer hung in the grey screen again, with only the Apple logo and spinning gear.

Anyone have any suggestions, beside Restore Volume?

Thanks,

Nicky