What Lurks Unseen Inside Your Computer?

As computers get more powerful, the gremlins that inhabit them also grow stronger and harder to detect.  Ever the maker of lists, PC World has assembled “The Ten Biggest Security Risks You Don’t Know About.”  From purloined data appearing on the web to fraudulent but persuasive phishing schemes, this list is enough to bring out the paranoid streak in even the most well-adjusted individual.