1. Stop using the Free version and purchase the Pro when on sale. (Free is NOT what it was anymore after Avast takeover)
2. Start using a firewall (should be basic standard for any PC user) and block:
analytics.ff.avast.com
CCUpdate.exe (probably not needed after 5.50 update)
To be really specific, I have blocked everything except:
151.101.54.202 (Check for updates)
3. Set Updates to 'manual' and uncheck everything in Privacy. (Needs 5.50 update)
4. Use a *cough*alternate*cough* version
5. Uninstall and use another similar software
I get no ads, popups, or forced updates. Most of the users complaining here are either on the Free version and/or don't use any firewall whatsoever.