Probably, in 90% of cases this is done on pirated versions of the program. Actually, hackers can hack one version, but sooner or later the antivirus will require an update, and this is where it turns out that the antivirus is not real.
webroot.com/secure - Of course, if everything was fine with the previous version, then you should roll back your Webroot to the previous version and prevent it from automatically downloading updates. You can, of course, install another antivirus, but at the moment Webroot provides one of the best protections on the market, so its previous version is better than the new version of some Webroot. www.webroot.com/secure
