This problem can happen after you update your Norton product. To fix the problem, download and run the Norton Remove & Reinstall tool to uninstall and reinstall Norton.
If you experience this problem with your Norton product for Mac, read I cannot start my Norton product for Mac.
Exit all the programs.
Restart the computer.
If the problem persists, go to Step 2.
If you have Norton Family installed, uninstall it before you run the Norton Remove and Reinstall tool.
Download the Norton Remove and Reinstall tool.
Save the file to the Windows desktop. On some browsers, the file is automatically saved to its default location.
To open the Downloads window in your browser, press the+ key.
Read the license agreement, and click.
You may see thebutton if your Norton product is from your service provider. Click .
After the computer restarts, follow the on-screen instructions to reinstall your Norton product.
Many Norton users have shared their solution for this problem on our community forum. See solutions from users about Norton not starting or opening on Norton Community.
Thank you for using Norton Support.