Now Playing: 06-04-12 Marketplace Tech Report

In the upcoming version of Windows, Internet Explorer will have its "Do Not Track" feature turned on by default. Goodbye creepy ads that seem to follow you around -- hello, more generic ads for great deals on car insurance? Advertisers are not amused. And the default does matter -- the vast majority of people have no idea how to manipulate the privacy settings on their web browsers. Plus, your medical history on a handy-dandy sticker.