After launching Unreal Engine from the Unreal Launcher the editor will come up briefly (20-30s), behave normally, then suddenly crash. Looking in the logs, I am getting the following:
[2018.07.04-17.25.28:409][820]LogD3D11RHI: Error: Result failed
at D:\Build++UE4+Release-4.19+Compile\Sync\Engine\Source\Runtime\Windows\D3D11RHI\Private\D3D11Viewport.cpp:303
with error 8876017C
[2018.07.04-17.25.28:410][820]LogWindows: Windows GetLastError: The operation completed successfully. (0)
[2018.07.04-17.25.28:895][820]LogWindows: Windows GetLastError: The operation completed successfully. (0)
[2018.07.04-17.25.28:895][820]LogWindows: Error: === Critical error: ===
[2018.07.04-17.25.28:895][820]LogWindows: Error:
[2018.07.04-17.25.28:895][820]LogWindows: Error: Fatal error: [File:D:\Build++UE4+Release-4.19+Compile\Sync\Engine\Source\Runtime\RenderCore\Private\RenderingThread.cpp] [Line: 819]
[2018.07.04-17.25.28:895][820]LogWindows: Error: Rendering thread exception:
[2018.07.04-17.25.28:895][820]LogWindows: Error: Fatal error: [File:D:\Build++UE4+Release-4.19+Compile\Sync\Engine\Source\Runtime\Windows\D3D11RHI\Private\D3D11Util.cpp] [Line: 233]
[2018.07.04-17.25.28:895][820]LogWindows: Error: Result failed
[2018.07.04-17.25.28:895][820]LogWindows: Error: at D:\Build++UE4+Release-4.19+Compile\Sync\Engine\Source\Runtime\Windows\D3D11RHI\Private\D3D11Viewport.cpp:303
[2018.07.04-17.25.28:895][820]LogWindows: Error: with error 8876017C
[2018.07.04-17.25.28:895][820]LogWindows: Error:
[2018.07.04-17.25.28:895][820]LogWindows: Error:
[2018.07.04-17.25.28:895][820]LogWindows: Error: [Callstack] 0x0000000048C2A388 KERNELBASE.dll!UnknownFunction []
[2018.07.04-17.25.28:895][820]LogWindows: Error: [Callstack] 0x000000001CE57884 UE4Editor-ApplicationCore.dll!UnknownFunction []
[2018.07.04-17.25.28:895][820]LogWindows: Error: [Callstack] 0x000000001A566D9B UE4Editor-Core.dll!UnknownFunction []
[2018.07.04-17.25.28:895][820]LogWindows: Error: [Callstack] 0x000000001A4A1949 UE4Editor-Core.dll!UnknownFunction []
[2018.07.04-17.25.28:895][820]LogWindows: Error: [Callstack] 0x00000000F988E796 UE4Editor-D3D11RHI.dll!UnknownFunction []
[2018.07.04-17.25.28:895][820]LogWindows: Error: [Callstack] 0x00000000F986D62A UE4Editor-D3D11RHI.dll!UnknownFunction []
[2018.07.04-17.25.28:895][820]LogWindows: Error: [Callstack] 0x00000000F986D58C UE4Editor-D3D11RHI.dll!UnknownFunction []
[2018.07.04-17.25.28:895][820]LogWindows: Error: [Callstack] 0x00000000F987AADF UE4Editor-D3D11RHI.dll!UnknownFunction []
[2018.07.04-17.25.28:895][820]LogWindows: Error: [Callstack] 0x000000001C65F0B6 UE4Editor-RHI.dll!UnknownFunction []
[2018.07.04-17.25.28:895][820]LogWindows: Error: [Callstack] 0x00000000F9621FF8 UE4Editor-SlateRHIRenderer.dll!UnknownFunction []
[2018.07.04-17.25.28:895][820]LogWindows: Error: [Callstack] 0x00000000F9627C4C UE4Editor-SlateRHIRenderer.dll!UnknownFunction []
[2018.07.04-17.25.28:895][820]LogWindows: Error: [Callstack] 0x000000001A37B713 UE4Editor-Core.dll!UnknownFunction []
[2018.07.04-17.25.28:895][820]LogWindows: Error: [Callstack] 0x000000001A37BD3A UE4Editor-Core.dll!UnknownFunction []
[2018.07.04-17.25.28:895][820]LogWindows: Error: [Callstack] 0x0000000020C13CC9 UE4Editor-RenderCore.dll!UnknownFunction []
[2018.07.04-17.25.28:895][820]LogWindows: Error: [Callstack] 0x0000000020C14CF6 UE4Editor-RenderCore.dll!UnknownFunction []
[2018.07.04-17.25.28:895][820]LogWindows: Error: [Callstack] 0x000000001A749FFC UE4Editor-Core.dll!UnknownFunction []
[2018.07.04-17.25.28:895][820]LogWindows: Error: [Callstack] 0x000000001A73ED63 UE4Editor-Core.dll!UnknownFunction []
[2018.07.04-17.25.28:895][820]LogWindows: Error: [Callstack] 0x000000004C283034 KERNEL32.DLL!UnknownFunction []
[2018.07.04-17.25.28:895][820]LogWindows: Error: [Callstack] 0x000000004C761431 ntdll.dll!UnknownFunction []
[2018.07.04-17.25.28:895][820]LogWindows: Error: [Callstack] 0x000000004C761431 ntdll.dll!UnknownFunction []
[2018.07.04-17.25.28:895][820]LogWindows: Error:
[2018.07.04-17.25.28:895][820]LogWindows: Error:
[2018.07.04-17.25.28:895][820]LogWindows: Error:
[2018.07.04-17.25.28:895][820]LogWindows: Error:
[2018.07.04-17.25.28:909][820]LogExit: Executing StaticShutdownAfterError
[2018.07.04-17.25.28:912][820]LogWindows: FPlatformMisc::RequestExit(1)
[2018.07.04-17.25.28:913][820]Log file closed, 07/04/18 10:25:28