For making adjustments to Avast antivirus shields open the Avast user interface then go to “menu” and click “settings” then from the options select “protection” then click on “core shields” then click the slider in order to turn it to red and switch it off also select a time duration for which you need to keep the shield off. I hope this gives an answer to your problem if you are still stuck then ask help from the technical team and Avast Customer Support & http://www.avast-phone-number.com/