SEP 12.1 LiveUpdate download error

Environment - Window 7 SP1 Professional, SEP 12.1.4 unmanaged client

We are looking for a solution, please do not tell us to run SymDiag, reinstall or update to the latest unless you absolutely know it will fix the problem.

We have several unmanaged clients.  Everything was working fine at close of business last week.  Nothing has changed.

Today we get an error when running  a manual LiveUpdate on the unmanaged clients.

from LiveUpdate:

Encountered an error while downloading file

sesc$20antivirus$20client$20win64_12.1_english_livetri.zip

Is there something going on with the Symantec LiveUpdate servers?   Managed clients may not be seeing this error.

Thanks,

Wally