The Avast AntiVirus installation process depends from device to device. Here are the instructions for downloading it on Windows or Mac. The first few instructions for either browser are the same.Go to the Downloads folder on the computer.Find the Avast installer file.Double-click the file.Allow the setup pop-up to come on the screen.After that, follow the instructions as per your OS Press the Enter button.Read the subscription information.To change the product, just click on it.Click on the Continue button.Follow the prompts to complete the avast.com/activate.
Note: If you are unable to find the Avast product key, then just visit www.avast.com/activate to log into your account and locate the key.First, move the cursor to the system tray and find the Avast icon.In case it is not present, click on the ^ button and then find Avast.Right-click on it.From the listing of several options, pick Subscription information.In the following prompt, click Enter a valid activation code.Input the Avast.com/activate code in the block.