Why isn't Unreal 4 doing a complete install?

Here’s what I was doing most recently:

  1. After changing the permissions (setting Run As Administrator) on all the .exe’s in C:\Program Files\Unreal Engine\4.0\Engine\Binaries\Win64, I clicked on Launch.
  2. The Unreal Editor opened and stayed open now.
  3. I could see Content Examples Project and my TestProject_0. I clicked on TestProject_0 and then on Open.
  4. It looked like the Editor tried to launch and then it crashed. So far I can’t solve this.

Hope this helps,
Greg.