Why does UE 5.0 work but UE 5.4 crash on startup?

Development Getting Started & Setup
,
4

hi @dorusoftware ,

Looks to me like the virus check has isolated part of your installation
Very common problem for UEFN
urc.exe and urc.dll get flagged as Malware from Microsoft Defender - General / Issues and Bug Reporting - Epic Developer Community Forums (unrealengine.com)

Indicate to your virus checker that UnrealEngine.exe is safe

see urc.exe and urc.dll get flagged as Malware from Microsoft Defender - General / Issues and Bug Reporting - Epic Developer Community Forums (unrealengine.com)

Then If you are using Epic Launcher binary Go back and use option Verify

If you want to build 5.4.3 from a working source repository try
UnrealEngine-5/README.md at lgpu542 · jimshalo10/UnrealEngine-5 (github.com)

1 Like