Can't open VS2013 through Editor CreateProc failed(740)

When trying to open VS 2013 through the editor, it gives me this error:

Could not open Visual Studio 2013 for
project A:/Projekte/Unreal Engine 4

The output log gives me the following messages:

LogWindows:Warning: CreateProc failed
(740) C:/Program Files (x86)/Microsoft
Visual Studio
12.0/Common7/IDE/devenv.exe “A:/Projekte/Unreal Engine 4
LogVSAccessor:Warning: Couldn’t access
module table (about 40 times)

I recently upgraded to Windows 10 Pro x64 and wiped my PC afterwards. So the VS2013 and UE4 installation is completely fresh except for the project itself. Before the upgrade, I was able to use it without problems.

I’m using UE 4.8.3 (also tested it with 4.7.6, same problem)
Microsoft Visual Studio Ultimate 2013
Version 12.0.40629.00 Update 5

I also have VS2015 Enterprise installed, but that shouldn’t be an issue, right?

Is there anything I have missed during installing and configuring VS? It works fine if I start VS first and run the game project from the solution.

Right click on the Epic Games Launcher and run as administrator. That should solve your problems. I had the same issue here: Editor cant find/open Visual Studio - Pipeline & Plugins - Epic Developer Community Forums

Works like a charm, thank you <3