Hi, thanks for using JustAnswer.com I am Cris.
Double-click the "Norton 360" icon in the system tray to open the Norton 360 window.
Click "Tasks" and choose "Manage Backup Sets" from the Backup Tasks section of the tasks screen.
Click the "Backup set name" drop-down menu and select the backup that you want to delete.
Click the "Delete backup set" link in the "Things you can do" section, select "Delete backup set and files" and click "Yes" to delete the backup.
If you have more than one backup to delete, select another backup set and repeat the procedure to delete it.
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