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Why 'one false click' lets hackers in

Speaking to a professional penetration tester, BBC News looks at the methods hackers can use to target personal computers through internet browsers.

Many users of the internet think that by not replying to 'phishing scams' - false invitations encouraging you to hand over personal information - they are safe online.

But hackers use increasingly sophisticated techniques to trick more savvy web users and gain control of their computers.

Trustwave Spider Labs of London is a professional penetration tester, hired by companies to test vulnerabilities in their cyber security.

Michele Orru, a senior security consultant at the firm, demonstrated to LJ Rich how by simply clicking on a single malicious link, you can fall prey to the control of a hacker, because of security issues connected with common browsers.

This is the second video in a series about penetration testers - in the first, LJ Rich learned how hackers can get control of webcams.

Video Journalist: Dougal Shaw