BleepingComputer Review: The Norton Anti-Virus Removal Tool will allow you to remove a damaged installation of a Norton or Symantec product that will not uninstall properly through the Windows control panel. In the event that Norton becomes damaged by a bad install or due to a virus, it makes it difficult, if not impossible, to uninstall it normally.
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In situations like this you can use the Norton Removal Tool to scan your computer for all Norton products and completely remove them. It should be noted that this tool will not prompt you for the products that you wish to uninstall. Therefore, make sure you have all data backed up for your Norton programs before proceeding.