Why will unreal engine not launch?

I have successfully installed the epic launcher, and unreal engine 4.13, but when I press the launch button, it says please wait then goes back to launch.
I have updated my video card. installed redistributers. directx.
I have reinstalled launcher and engine.
and am running as admin.

Hey Cylyoraz-

I’m sorry that you are having an issue with the Epic Games Launcher. In order for us to offer the best support, we have recently modified the process for how Epic Games can help troubleshoot your Launcher issue. Please visit http://help.epicgames.com/ for technical support, here you can find information and solutions for common issues, as well as a contact form if you still need additional assistance.

Thanks!