DavidR-
I have latest version of Free-6.0.1203

I was using Windows Security Essentials, and it has not been removed.

I have sent info to Avast, per your recommendation.

Any ideas re blue screen?
I’ve tried the Debugging tool for Windows X64, but can’t get it to read any of the dumps, so until I figure that out, I’m at a loss.

Next step is to uninstall AVAST, and see if the blue screens stop.

Thanks again to everyone for quick and detailed responses.