Avira personal antivirus and security alert
I face problem when I open my yahoo and Gmail accounts, I receive this message (The site's security certificate has expired) my Avira personal antivirus is not expired, I can use Google and yahoo search engine and my kids can play online games on other sites, So what is the problem and which kind of Avira antivirus is better for me because there are many kinds,
I do not know which one should I use?
Thanks








