I'm glad the bit defender workaround worked.
Sueska has a post here about the Spybot Hosts File entries and Avast, as well as a post from BobxT that might be helpful:
https://forums.spybot.info/showthrea...l=1#post478688
There's no workaround posted there for re-immunizing and having it "stick" other than uninstalling Avast. By linking to that I'm not suggesting that you uninstall Avast or anything like that, I'm just linking to it so that you can get an idea about what is going on with the four unimmunized entries and why it is happening. The four sites that are allegedly removed from the host file entries by Avast are listed there by BobxT. Note that Sueska says in their last post that Web of Trust has negative reviews of the sites and that they checked Whois and cannot validate that these websites are associated with Avast:
https://forums.spybot.info/showthrea...l=1#post478734
(As an aside, I thought that was a really great and well worded post.)
Sorry there's no workaround for that one that I know of, but at least you have some idea of what might be going on.