Can't start UE4/ARK dev kit, failed to compile global shader

I am getting an error when attemptning to start the ARK Dev kit / UE4.

The weird thing is, it did start and “work” when I had it installed on my HDD but after I reinstalled it on my SSD I get the error below.

I have tried starting the dev kit without the launcher, loads but doesnt start.
I have tried reinstalling.
I have tried verifying(three times).

I have the following specifications:
Intel i7-4790K CPU 4.00GHz
16GB RAM
Nvidia Geforce 980GTX
64bit Windows 10

The error:

Fatal error: [File:H:\SVN_Ark\Engine\Source\Runtime\Engine\Private\GlobalShader.cpp] [Line: 635]
Failed to compile global shader TGenerateClutterCS

VERSION: 0.0
KERNELBASE.dll!UnknownFunction (0x00007ffa1e329e08) + 0 bytes [UnknownFile:0]
UE4Editor-Core.dll!UnknownFunction (0x00007ff9bdcb8b5d) + 0 bytes [UnknownFile:0]
UE4Editor-Core.dll!UnknownFunction (0x00007ff9bdb9db1f) + 0 bytes [UnknownFile:0]
UE4Editor-Engine.dll!UnknownFunction (0x00007ff9bb376faf) + 0 bytes [UnknownFile:0]
UE4Editor-Engine.dll!UnknownFunction (0x00007ff9bbed0cb1) + 0 bytes [UnknownFile:0]
UE4Editor-Engine.dll!UnknownFunction (0x00007ff9bbecf865) + 0 bytes [UnknownFile:0]
UE4Editor-UnrealEd.dll!UnknownFunction (0x00007ff9b9e3cd04) + 0 bytes [UnknownFile:0]
UE4Editor-UnrealEd.dll!UnknownFunction (0x00007ff9b9e2356d) + 0 bytes [UnknownFile:0]
UE4Editor-UnrealEd.dll!UnknownFunction (0x00007ff9b9e0ac03) + 0 bytes [UnknownFile:0]
UE4Editor-UnrealEd.dll!UnknownFunction (0x00007ff9ba0e247d) + 0 bytes [UnknownFile:0]
UE4Editor-UnrealEd.dll!UnknownFunction (0x00007ff9b9e3469a) + 0 bytes [UnknownFile:0]
UE4Editor-UnrealEd.dll!UnknownFunction (0x00007ff9b9e3437b) + 0 bytes [UnknownFile:0]
UE4Editor-UnrealEd.dll!UnknownFunction (0x00007ff9ba149613) + 0 bytes [UnknownFile:0]
UE4Editor-UnrealEd.dll!UnknownFunction (0x00007ff9ba0ddde0) + 0 bytes [UnknownFile:0]
UE4Editor.exe!UnknownFunction (0x00007ff79704f80d) + 0 bytes [UnknownFile:0]
UE4Editor.exe!UnknownFunction (0x00007ff79704f93a) + 0 bytes [UnknownFile:0]
UE4Editor.exe!UnknownFunction (0x00007ff79705c0e0) + 0 bytes [UnknownFile:0]
UE4Editor.exe!UnknownFunction (0x00007ff79705d009) + 0 bytes [UnknownFile:0]
KERNEL32.DLL!UnknownFunction (0x00007ffa1f602774) + 0 bytes [UnknownFile:0]
ntdll.dll!UnknownFunction (0x00007ffa21e10d51) + 0 bytes [UnknownFile:0]
ntdll.dll!UnknownFunction (0x00007ffa21e10d51) + 0 bytes [UnknownFile:0]

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