Since a lot of search engine users end up here, I’ll add some more info.
This thread on the Answerhub contains more information: https://answers.unrealengine.com/que…4896/view.html
Basically, in 4.25 Epic (presumably by accident) started using the CreateDXGIFactory2 API (along with other DXGI functionality) that is only available in Windows 8.1 and newer. From what I understand, the issue has been reverted in the git repository on June 2nd but they appear to wait releasing the fix.
If you need Windows 7 support right now either:
- Stick with 4.24 until 4.25.2 (not sure if it comes/fixes the issue) or 4.26 comes out.
- Compile the engine from source.