And to tighten security we recommend to change these ( default ) settings :
1) Avast - Settings - General - and check : Enable Hardened Mode - Aggressive.
2) Avast - Settings - Components - Webshield - Customise - Main Settings - and check : Warn when downloading files with poor reputation.
3) Avast - Settings - Components - Webshield - Customise - Main Settings - and uncheck : Do not scan trusted sites.
Greetz, Red.