Versions of Norton solutions older than 22.x will be supported based on the following guidelines:
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NortonLifeLock will provide virus definition updates for 3 years after the release of each major software version.
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If you receive virus definition updates for an earlier version, you will continue to receive the definition sets that are compatible across all Windows platforms which your Norton solution supports.
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If you require support for an earlier version, you may be required to update to the latest version of the solution during the support process.