This post here by Epic Games might help you in resolving your issue with Epic Games Launcher.
You can also find more help with regards to Fortnite in here.
For any other issue you have with your gaming experience in Fortnite, you can Email Epic directly by clicking on that EMAIL US button in that 2nd click. This forum is dedicated to Unreal Engine related questions so I doubt that community members would be able to assist you with such issues.
yesterday I made the format of the laptop, and now i have the newest win 10 update. can i return in previous version of win 10 or not ? sorry but i dont know very well this functions
and yesterday after the format (and win 10 update) it was normal the game …
You can roll back some of the newly installed updates and potentially delete them. Do this at your own risk or check Microsoft forums for more information:
Simply put, click on start > search for update, and open the Windows Update manager. Click on the View installed update history and on the top you will have the option to uninstall recent updates.