The Norton Error code 8504 may occur due to product up-gradation failure or another security product installed on your system. To fix the Norton error code issue, read the quick, simple steps given below and proceed with the same.
First, try to remove any non-Symantec security product, i.e., any other antivirus application installed on your Windows or Mac system.
Before removing the non-Symantec security product from your system, make sure to take a backup of data stored on the device.
To know how to uninstall your non-Symantec security product, click the Call button available on this screen.
After uninstalling the non-Symantec security product, restart your Windows or Mac system.
Make sure to close all the existing applications on your system.
After restarting your system, check if the error code 8504 is resolved.
If not, uninstall and reinstall the Norton antivirus on your system.
Make use of the Norton Remove and Reinstall tool to uninstall and reinstall the Norton application on your system.
Download and install the Norton Remove and Reinstall tool on your system.
After installing, launch the Norton Remove and Reinstall tool.
Accept the license agreement displayed on your screen.
Click Advanced Options --> Remove Only --> Remove.
Once the Norton application is uninstalled successfully, a pop-up dialog box will appear on the screen, click the Restart Now button on it.
Wait for your system to restart and become stable.
After that, re-install the Norton application on your system and check if the same issue recurs.
If so, contact our technical support team to resolve the Norton error code 8504.