There are link for troubleshooting on the website and you have to click on the link that is the closest description of the issue that you are facing. For the new users the instructions can appear to be a bit complicated and in that case the best option would be to get in touch with the Avira Contact Support Phone Number.
More Info :- http://www.livetechnicianhelp.com/avira-antivirus-contact-number.html