Howdy, y'all .... my problem and system seem more basic than other posts in this topic. I did "restore defaults" to get rid of my old custom scans, used the full etc. scans that are on the UI, and, no matter what I do, the Windows 10 (1709 x64) system DOES NOT SHUT DOWN after scan. My scans run at 3am, and should shut down my machines afterward. Avast version 17.9.2322 build 17.9.3761.278.
Thanks for your help!