To remove the illegal warnings which appears,3

open avast internet security

on the Left Side You’ll See Several Options

Click “Firewall” in left option panel than select “Application Rules”
,
now look for “Avast Software” and click on it to expand. Now expand Avast Antivirus and block all connenctions,

After blocking all connections, click on Settings and than click community and deselect all options. Now you wont see any warning messages.
Also :

On the Left Side you”ll Community Option.click on it and

Uncheck The community Support

thatz All Enjoy

Note: This trick does not affect the performance of the Avast Internet Security but only blocks the feedback system which is used by Avast to detect illegal licenses.

thanks