Editor's Note, November 4, 2009: IObit, the maker of Security 360, has been accused of intellectual property theft of malware definitions. (Read more about the dispute in our CNET News story.) Per our policy, CNET Download.com is no longer hosting the installation file. The Download Now link points to IObit's Web site, where the company claims to have posted software that is compliant with intellectual property laws. CNET has not substantiated this claim.
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