Google's Safe Browsing Now Targets Fake Download Buttons | News & Opinion | PCMag.com. The biggest source of malware and viruses is stuff you download yourself from the Internet. Social Engineering techniques are used to get the user to click on deceptive download links. Google thinks the problem is so severe that it is going to start flagging such sites with big RED stop signs. Anyone who has ever had to spend hours removing a virus or malware infestation will applaud this move. As the designated geek in my circle of family and friends, I have spent countless hours on other people's computers removing stuff they downloaded innocently. So, family and friends, let me install some protection on your computer; and, if you still download a nasty virus that gets through, and you did it after you saw a page like this, you can hire someone else.