Impossible start ue4

Hello
I can not open a EU4, I have an error message when I click on the icon of startup.
C: \ program files \ Unreal engine \ Launcher \ portal \ binaries \ win64 \ exe epicgameslauncher is no longer applicable.
How to remedy it

Thank you

ps: Version 10 download

it’s ok, i do a back up pc, it’s good now