I just tried to launch the content examples project and it will get to 95% and crash.
oginId:b3655caa45d03caaf71f768eda94d704
EpicAccountId:eb641690ac304c65918be533d397b7e5
Assertion failed: [File:D:\Build++UE4\Sync\Engine\Source\Runtime\Engine\Private\ShaderCompiler\ShaderCompiler.cpp] [Line: 4523] Failed to compile global shader FSSDSpatialAccumulationCS . Enable ‘r.ShaderDevelopmentMode’ in ConsoleVariables.ini for retries.
UE4Editor_Core
UE4Editor_Core
UE4Editor_Core
UE4Editor_Core
UE4Editor_Engine
UE4Editor_Engine
UE4Editor_Engine
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor_UnrealEd
UE4Editor
UE4Editor
UE4Editor
UE4Editor
kernel32
ntdlllink text