Hi all, the only thing to do for having Avast working fine with El Capitan or the new OSX
is to disable the scanning over secure connection. This setting is the one that is conflicting. All the I cloud problem all the App Store issues and the Itunes as well will most probably disappearing after switching it off. Go preferences, web shield settings and disable "scan secure connection" .
The one that having Avast installed were upgrading from Yosemite were really suffering.
I havent tried to keep the option "from browser only" but no reason to try, I just was too busy in working to make experiment.
I hope that will help most of you,
Cheers
Andrea