In order to fix Norton Not Responding error, you can try to restart your system first.
First of all, you need to close all the programs which are currently running.
Furthermore, click on the start button at the bottom left of the screen.
In addition, you need to click on the arrow beside the Shut Down option.
Select Restart from the list and then wait until the process is finished and system restarts.
Method 2 Install Norton Removal and Reinstall Tool:
First, you need to make sure that the Norton Family is not installed on your system.
If it is installed then uninstall it first and then follow the instructions.
Now, visit the manufacturer website to download the Norton Removal and Reinstall (NRnR) Tool.
Save the file on your system and then double click on the NRnR.exe to run the setup.
Click Yes, to allow the permission to the program to make changes to your system.
Now click on the Agree to accept the software license agreement.
Furthermore, click on the Removal & Reinstall button to proceed further.
In case you are using the Norton Product purchased from your service provider then click on the Remove button.
In addition, click on the Continue for further process.
In the end, click on the Restart Now and wait until system restarts.
In conclusion, you need to follow the instructions to reinstall the Norton product.
You can follow either of the methods mentioned above to fix Norton Not Responding error. If you are facing any difficulty to find the resolution then you may contact Norton Support. You may also visit norton.com/setup for the further help and troubleshooting.