Symantec's Hacker Protection utility, like Shields Up, scans your PC for open ports--electronic gateways into a computer--that hackers can exploit to access a system and files.

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Alvin Estevez is president, co-founder, and managing director of Enigma Software Group USA, a developer of PC and Internet security systems, including the SpyHunter anti-malware software diagnosis and removal utility.

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Alvin Estevez is the cofounder, president, and managing director of the Enigma Software Group, which develops PC and Internet security systems, including the SpyHunter anti-malware software diagnosis and removal utility.

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