WOODBURY - Hundreds of thousands of Apple computers were infected by a virus, despite being marketed as computers that are invulnerable to hack attacks. Some 600,000 Mac computers worldwide, mostly in the U.S. and Canada, were infected with a Flashback Trojan virus that lets hackers take control. The virus attacks Apple's Mac OS-X operating system. Security experts say Mac users need to install a patch to prevent their computers from being infected.To watch an extended interivew with an expert on the Mac virus, go to channel 612 on your iO digital cable box and select the 'iO Extra' tab.

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