CNN says " If you're using Internet Explorer and click on the wrong link, a hacker could hijack your computer."  This is how it works: Hackers set up a website that installs malware when you visit it. If you're duped into visiting the website while using the Internet Explorer program, malware seeps into your computer and gives a stranger total control. You might not even notice. "I'd say someone taking control of your computer is just the beginning of the worst case scenario," said Adrian Sanabria, a security expert with 451research.com. "Because then they steal your info, get access to your email, etc." (Source : CNN )