How Do I Fix Norton Error Code 8504100?

The Norton error 8504100 mainly occurs when the installation of the antivirus software fails.

If you have installed any other antivirus software, uninstall it. If you are trying to install another version of Norton without uninstalling the existing antivirus software, the norton error code 8504100 may occur.

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.