Launcher is crashing on startup

I have used ue4 for a couple of months now and since I’ve reinstalled windows, my launcher crashed on launch…
it used to work normally for 1 day, I didnt modify anything on my pc… And that day it worked, I couldnt even install ue4 4.12, an error would pop up telling me that the install has failed. Any ideas on how to fix this?

Hi DeRock,

I’m sorry that you are having an issue with the Unreal Engine 4 Launcher. Please try the following solution on this AnswerHub post:

UE4 install failed with code MD-0005

If this does not resolve your issue, please visit:

Here you will find information and solutions for common issues, as well as contact information should you require additional assistance.


Steve H.