Editor Crash on Startup

whenever I try to launch the editor it loads to 83% and then crashes. reading
“Illegal instruction - code c000001d (first/second chance not available)”
I tried reinstalling the engine and I have no projects, so I know its not a corrupt project file.

here’s the full error report:

Illegal instruction - code c000001d (first/second chance not available)

XAudio2_7
XAudio2_7
XAudio2_7
UE4Editor_XAudio2!XAudio2Create() [d:\build\++ue4+release-4.15+compile\sync\engine\source\thirdparty\windows\directx\include\xaudio2.h:1244]
UE4Editor_XAudio2!FXAudio2Device::InitializeHardware() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\windows\xaudio2\private\xaudio2device.cpp:125]
UE4Editor_Engine!FAudioDevice::Init() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\engine\private\audiodevice.cpp:221]
UE4Editor_Engine!FAudioDeviceManager::CreateAudioDevice() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\engine\private\audiodevicemanager.cpp:147]
UE4Editor_Engine!UEngine::InitializeAudioDeviceManager() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\engine\private\unrealengine.cpp:1975]
UE4Editor_Engine!UEngine::Init() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\engine\private\unrealengine.cpp:943]
UE4Editor_UnrealEd!UEditorEngine::InitEditor() [d:\build\++ue4+release-4.15+compile\sync\engine\source\editor\unrealed\private\editorengine.cpp:557]
UE4Editor_UnrealEd!UEditorEngine::Init() [d:\build\++ue4+release-4.15+compile\sync\engine\source\editor\unrealed\private\editorengine.cpp:846]
UE4Editor_UnrealEd!UUnrealEdEngine::Init() [d:\build\++ue4+release-4.15+compile\sync\engine\source\editor\unrealed\private\unrealedengine.cpp:75]
UE4Editor!FEngineLoop::Init() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\launch\private\launchengineloop.cpp:2513]
UE4Editor_UnrealEd!EditorInit() [d:\build\++ue4+release-4.15+compile\sync\engine\source\editor\unrealed\private\unrealedglobals.cpp:76]
UE4Editor!GuardedMain() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\launch\private\launch.cpp:150]
UE4Editor!GuardedMainWrapper() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:134]
UE4Editor!WinMain() [d:\build\++ue4+release-4.15+compile\sync\engine\source\runtime\launch\private\windows\launchwindows.cpp:210]
UE4Editor!__scrt_common_main_seh() [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl:264]
kernel32
ntdll

Hi ExplosiveCrayonz,

Try deleting the DerivedDataCache directory from the Engine install directory and relaunching.

Let me know if this does nto resolve the issue.

Thanks,

.

unfortunately that didn’t work. I’ve added the rest of the error report if that helps

Please try the solution posted for the exact same error here: Unreal Editor Stuck at 83%. Won’t Start

I think the best option is to copy your project into a new user account and try to load it, this always works!! After that, just reopen the project from your original account.