This just happened to me as well. This morning I started my computer, everything was fine. I shut it down for 1 hour, came back and Avast was telling me my Behavior Shielf, Ransomware Shield and Password Protection were all turned off. I restarted my computer and Avast said the same thing. I turned the Shields on but why is this happening? This is the first time it has happened to me.
I am using Avast Premium, Version 2.1.1.2449 - build 2.1.1.5968.643
Windows 10 Home 2004 Version 1904
No other AV installed
This is concerning? I am running the Full Virus Scans but don't see anything coming up.