got an error about CreateDXGIFactory2 on dxgi.dll or something
Viewing post in Cactus (Prototype) jam comments
It seems like this is an issue with UE4's engine code and it won't be fixed until the next UE4 hotfix/release. https://forums.unrealengine.com/unreal-engine/feedback-for-epic/1758469-unreal-engine-4-25-and-windows-7-compatibility