https://campaigns.avira.com/en/bzd/antivirus/av_pro_trial_rlm

Enter your email address in the box and click the green button labeled “Get Free License”. Then you will receive an email from Avira. In that email, you must click on a link. This link will take you to the Avira website where you will create an Avira account. After that, you can download the installer directly from the “My Avira Account” section of their website.