[=;287310]
I cannot see Unreal Editor appeared on screen after clicking on ‘Launch’ button from Epic Launcer. I can see application ‘UnrealEditor.exe’ in TaskManager application list - probably window position is off? However, UnrealEditor for 4.7.6 (latest) is fine.
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Might take some time for Splash to appear. Try Alt+Tab and see if theres a startup splash screen floating around stuck at 95% (which is somewhere around when it compiles shaders). Just be patient and wait for it.