Rogue antivirus and scareware programs are usually delivered as drive by downloads spawned by malicious Web sites. These leverage holes in Windows, common Web browsers or browser plugins to bypass your computer s security systems. With your machine disinfected, take a few moments to update your operating system software and any third party applications to their latest (and most secure) version. Mobile becomes a prime phishing attack vector, hackers will increasingly employ machine learning in attacks and cloud will increasingly be seen as fertile ground for compromise.
Source: https://threatpost.com/step-6-update-and-patch/91812/