Think of how many people are scammed by someone phoning to say their computer is infected and needs repair. As InfoWorld’s Fahmida Rashid recently chronicled, they typically say they’re with Microsoft or a Microsoft partner, and your computer is infected and needs fixing immediately.

Unfortunately, millions of people fall for this scam and end up installing malicious software on their system. They sometimes even pay for the privilege, compromising their credit card numbers in the process.