- Step 1:Open the Control Panel window and go to the Programs & Features section.
- Step 2:Now, select the antivirus software you want to remove and click on the Uninstall button.
- Step 3:Complete the uninstallation process by following the instructions on the screen.
- Step 4:If you have already installed the Norton antivirus software, remove it using the Norton Remove and Reinstall tool.
- Step 5:Go to the official Norton website and download the tool.
- Step 6:Once you have downloaded the tool, locate the installer file.
- Step 7:If the file is saved in the default location, press the Control + J buttons to open the Downloads folder.
- Step 8:Double-click on the NRnR icon to run the
Remove and Reinstall tool.
- Step 9:Accept the license agreement after reading the terms and conditions and click Agree.
- Step 10:Now, click on the Remove & Reinstall button.
- Step 11:If you have installed the Norton antivirus software from the service provider, you can only see the Remove button.
- Step 12:Click Remove or Continue and wait until the installation process is complete.
- Step 13:Select the Restart now option to completely remove all the registry files of Norton.
- Step 14:Once the computer restarts, re-install the Norton antivirus software.
- Step 15:Download the latest version of the antivirus software from the official Norton website.
- Step 16:Make sure to enter the correct product or license key during the installation.
- Step 17:Run the installer file and complete the installation of Norton antivirus software.
- Step 18:Open the Norton user interface to run a full system scan to detect viruses present on your computer.
- Step 19:By using these above steps to fix the norton error code 8504100.