If you're running Windows, depending upon the version go to Control Panel, and then to Programs. Once you're in Programs you can uninstall Norton, and any other software that you're not using. If you reformat a drive you're going to lose everything on that drive. If you're concerned about losing important photos, etc., back them up. If you're unsure of how to proceed, I suggest contacting BestBuy and using their geek squad services, or a local computer store.