I tried to run LiveUpdate, and couldn't. Kept getting LU1083, which means that Live Update may be corrupted. After searching, I found that I had to delete the:

*SETTINGS.LIVEUPDATE

files that were on the computer. (There were 4)

After this, things were back to normal.

I was worried, as I had manually downloaded new defs and did a full scan, without finding any problems. Determined to fix it paid off. I am now able to run Live Update, even though it is also set to run in Express mode.

I don't know what corrupted it, but something apparently did!

All is good, now!