I’ve installed previous versions of the game engine without trouble. But the current version downloads completely, but then fails during the installation. I have no idea why. I’m using the latest version of windows 10 and have plenty of hard drive space.
I’ve tried completely uninstalling the engine and the launcher, then re installing the launcher but the game engine still fails to install.
Hello Dumiatis,
I’m sorry top hear that you are having trouble. Is the installer giving you any error codes?
Could you please follow the steps here to generate your debug log and dxdiag?
Thanks!
Hello Dumiatis,
We haven’t heard back from you in a few days, so we are marking this post as Resolved for tracking purposes. If you’re still experiencing this issue, please try the suggestion that I mentioned above then post back here with the requested info.
If you need anything else, feel free to ask.
There seems to be a bug in the Launcher. What I did to resolve the issue was to set the 4.10 version as Current. However, after doing that do not click on the same button to Install, instead, click on the large Install button on the top left of the screen and your install should continue.
This solved the problem for me, after nothing else would - THANK YOU SO MUCH!
Seriously though, why is the launcher so buggy that this issue would ever be allowed to happen? It’s embarrassing…
AGH it fixed it, then it installed, then it broke again 
same error as before (code 0))
Now the trick won’t work
I haven’t tried this myself yet but perhaps try running the Unreal Editor executable directly. You will find it under \Epic Games\4.10\Engine\Binaries\Win64\UE4Editor.exe. If that doesn’t work try running it as Administrator.
Sorry, my previous comment is if you still have a copy of Unreal Engine installed, not if you are trying to install a new version.