Originally, antivirus software was created for detecting and eliminating computer viruses. It can defend users from malicious browser hijackers, ransomware, keyloggers, backdoors, rootkits, trojan horses, worm, fraud tools, adware and spyware. So if you’re using avast antivirus and you don’t know how to turn off avast antivirus then this article very helpful for you to disable it. Below are the steps to Turn Off Avast. Step 1: Open Avast from your computer Step 2: After click on menu and then go to settings options Step 3: Under settings section go to left side bar and click on protection and then click on core shield Step 4: Under configure shield settings » file shield» then untick on Enable file shield option after you can see the popup box then click on stop indefinitely image shown below. Step 5: After go to behaviour shield tab » then untick on Enable behaviour shield option after you can see the popup box then click on stop indefinitely image shown below Similarly disable the other two shields like web shield and mail shield as well Shortcut method: or disable all shields at once just turn OFF the button