If your Norton antivirus stops functioning or does not open, this could be unpleasant. A botched update may have caused this issue. The first step in resolving Norton issues is to restart the computer after closing any open apps. Use the "Norton Removal and Reinstall" utility to uninstall and reinstall Norton antivirus if the issue continues. You can also check if there are any Norton updates available. Maintaining an updated Norton Antivirus version is essential due to frequent malware database upgrades.