# UE will not launch

**URL:** <https://forums.unrealengine.com/t/ue-will-not-launch/487403>\
**Category:** Platform & Builds\
**Tags:** engine-crash, unreal-engine, UE4, question, load-error\
**Created:** [August 13, 2021, 3:40pm UTC](https://forums.unrealengine.com/t/ue-will-not-launch/487403 "2021-08-13T15:40:34Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![MrAlt](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@MrAlt](https://forums.unrealengine.com/u/MrAlt)\
**Post date:** [August 13, 2021, 3:40pm UTC](https://forums.unrealengine.com/t/ue-will-not-launch/487403/1 "2021-08-13T15:40:34Z")

</div>

I have tried uninstalling all the previous engines and reinstalling only to occur the same issue. I have downloaded countless drivers to solve the issue including MS VS19, Nvidia, Windows 10 drivers almost everything. The strange thing is I used UE on this system all last year learning development. I came back recently trying to pick it back up and the epic launchers works fine however unreal engine will not launch at all it will load to eighty or ninety percent then the error below appears.

Unhandled Exception: EXCEPTION\_ACCESS\_VIOLATION reading address 0x0000000000000000

AudioDevProps2\_7ffb21490000  
xaudio2\_9  
xaudio2\_9  
xaudio2\_9  
xaudio2\_9  
UE4Editor\_AudioMixerXAudio2  
UE4Editor\_AudioMixer  
UE4Editor\_Engine  
UE4Editor\_Engine  
UE4Editor\_Engine  
UE4Editor\_Engine  
UE4Editor\_Engine  
UE4Editor\_Engine  
UE4Editor\_Engine  
UE4Editor\_UnrealEd  
UE4Editor\_UnrealEd  
UE4Editor\_UnrealEd  
UE4Editor  
UE4Editor\_UnrealEd  
UE4Editor  
UE4Editor  
UE4Editor  
UE4Editor  
kernel32  
ntdll