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Keep your Norton Anti-Virus updated.
Norton Anti-Virus 9.x/10.x Defs are the latest anti-virus detection files.
The installer will automatically update Norton AntiVirus for Mac virus definitions and engine files to detect and repair the most recently discovered Macintosh viruses. This file is a self-extracting archive which contains the Norton AntiVirus Virus Definitions Installer.
Once downloaded and expanded on your hard drive, simply double-click on the Installer and the appropriate files will be installed on your computer.
They are also available via the LiveUpdate feature in Norton Anti-Virus 9.x/10.x
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