100% Symantec LUALL.EXE
Recently and without warning I had a non-DeSC machine fail to receive LiveUpdates from the Symantec Antivirus server. The reason why I was able to notice so quickly was that the LUALL.EXE process was stuck using 100% of the processor and its claims on real system memory were escalating expodentially. Forced LiveUpdates continually failed and a manual reinstall of the software did as well. The problem existed for all users on the machine but a Windows System Repair affected no change.
Working on the assumption that I had missed something in the manual uninstall process I decided to simply download the Intelligent Updater from Symantec’s site. It contains the most recent virus definitions in a software package that will search for versions of the antivirus software on your drive, update it and clean up after itself. After a few days in observation I can say that whatever I missed in the manual install was cleaned out by the Intelligent Updater. The machine is back to its old healthy LiveUpdate habit.