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Fix the installation error and keep your device safe

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Some Windows users report that they see error 8504,104 every time they try to uninstall, repair, or update their Norton Antivirus product. In most cases, this problem is said to occur in Windows 10.

Here is a list of possible scenarios that could trigger this error:

Common Inconsistency – It turns out that this particular problem will most likely occur due to the inconsistency that has to do with InstallShield and the way Norton deploys it to complete reinstallation and uninstallation attempts. In this case, you should start with a simple reboot of the system and see if that solves the problem for you.

Corrupt installation: You may see this error message in certain circumstances due to some corruption affecting the conventional uninstall phase. In this case, you should be able to fix the problem by running the specialized Norton Remove & Reinstall tool to remove all Norton components and reinstall them forcibly.

Third-party AV conflict: Another potential cause that could cause this error is a different third-party suite or security scanner that conflicts with the Norton installer. In this case, you should fix the problem by using the Programs and Features menu to uninstall the conflicting third-party AV suite / AV scanner.

Restart your computer

Before trying a more permanent solution, if Norton security has encountered an error 8504, you should start with a simple reboot and see if the problem persists after the next boot. So reboot your computer conventionally and repeat the action currently causing the 8504,104 error once the next boot has been completed and see if the problem is fixed.

In case you are still facing the same behavior, go down to the next potential solution below.

Using Norton Remove and Reinstall

The vast majority of users who encountered errors 8504,104 have confirmed that the problem was resolved entirely after running the Norton Remove and Reinstall tool. It is a specialized tool developed internally, especially for situations where the antivirus cannot be uninstalled conventionally.

This will remove any files belonging to Norton AV and any leftover files that may be the cause of the 8504,104 error.

Open your default browser and access this link ( here ) to download the Norton Remove and Reinstall utility. Once the download is complete, double-click the executable and click OK on the initial screen.

Accept the Norton License Agreement

Then click Remove and Reinstall to force the application to uninstall Norton AV and then reinstall it fresh.

Note: If your service provider offers your Norton product, you may see a Remove button instead.

Uninstall and repair tool

To confirm the uninstallation, click Remove or continue – depending on whether you will perform a Remove only or Remove and Reinstall procedure.

If you just did an uninstall, click the following hyperlink to reinstall the Norton product you previously uninstalled. Uninstall and reinstall Norton.

If you see the 8504,104 error still occurring, scroll down to the next potential solution below.

Uninstalling the conflicting third-party AV suite (if applicable)

It turns out that this problem can also occur due to a conflict between Norton and another third-party tool that is also installed on the computer that has the 8504,104 on error.


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