Jacob and HeffeD,
Thanks very much for the quick replies. It was the real-time scanner auto-update setting -- I have that now configured to NOT auto-update the AV database and I will monitor that to confirm. Funny -- I have been using Comodo since version 1.something and I don't remember having to tell the scanner not to update definitions -- just the "more" settings page. I could be wrong about that. No matter... now that I know where to check all is well.
By the way (and this is outside the scope of this posting, but interesting, maybe, nonetheless), until last week this box was running v.3.? (14 maybe? -- the last of the 3 dots, anyway) -- until new AV database updates stopped being available for that old version. It seems quirky to me that during that last week on v.3.x when I would manually update the "progress bar" would get to 5% and then instantly pop up with "Your Virus Definitions are already up to date" (not an exact quote). In reality, they were not up to date at all -- quite the opposite! They were stuck at the last available update for that old version which is no longer being supported with new AV database definitions. However, these "faux updates" ere enough to keep Windows Security happily in the dark and it never once complained that my virus definitions were out of date. It seems like a better message would be something like: "Yikes! We can't update your AV Definitions because you are using an ancient version!" And maybe add, for people like me, "...so get off your butt you lazy bozo and get the latest software!" I only bring this up because there may be others who turned off the auto-updates but unlike me, are unaware that support for their old versions has stopped.