@0Quivos0 Did this post works for you?
https://answers.ea.com/t5/Bug-Reports-Technical-Issues/Can-t-install-reinstall-EA-Desktop/td-p/9805968When it says to click the option: "Beta: Use Unicode UTF-8 for worldwide language support".
I did not test it with the installer (my username has a é character) not also with the app but in the next days I will test it (right now I don't want to reboot my PC).