To fix ‘untrusted system file normaliz.dll’ in Fortnite, you need to update your Windows. To update your Windows, you have to follow the steps explained below.
Step 1: The first thing you have to do is to go to your browser and open up the following link.
Step 2: Now click on the Update now option to install the Update Assistant.
Step 3: Open the Update Assistant application and click on Yes.
Step 4:After that, click on the Update Now option and then the Next option afterwards.
Step 5: Now you have to wait to get your update ready and then click on Restart now.
Step 6: The Windows is updated, now you can open the Epic Games launcher and run your Fortnite game.