The place to protect your computer against privacy invasion is your Web browser. When you go online, websites install "cookies" on your computer that track your movements. Some cookies can be beneficial -- like the ones that remember your passwords so you don't have to log into your online accounts every time you visit a site. But some cookies are designed to remember everything you do online, build a profile of your habits, and sell that information to advertisers and other companies.
Most browsers, including Internet Explorer, Mozilla Firefox, and Safari, let you turn on a "Do Not Track" tool to tell sites you don't want cookies installed. (It's not yet clear whether sites and ad networks will respect those Do Not Track signals from users.) Take a look at the privacy settings offered in your browser (usually found in the Tools menu) to see whether you can fine-tune them to keep the good and block the bad. — Common Sense Media The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.