Recent update/upgrade to my Debian system on Jessie 8 and now will not boot.

[Darin Peterson]

On Thursday last week, I performed an update to my system, and now my
system will not boot. Originally, I was able to boot in rescue mode to a
command prompt, and I attempted to roll back the updates, but at this
point, my system will no longer boot in either normal or rescue mode. Not
sure what to do at this point, and I'm looking for guidance from anyone who
can help resolve this issue.