Daily Update problem

I receive the Daily Update message and select Update Now. The update goes through the process (usually 4-5 minutes) and returns me to the channel I was watching.  However after 2-3 minutes my screen freezes and my remote is locked. I have  to unplug my box and go through the update process a second time after which everything is normal.

This has happened 12 nights in a row.   A Comcast tech came this morning and found nothing wrong with my system. Is the Daily Update process returning me to live tv prematurely as the update is still going on?