UE5.4.4 on 10750H (12 Logical Cores) & 16GB RAM
I’ve clicked my Windows Machine under Quick Launch and it’s been “Processing Assets for Windows” for over an hour with no indication of an end in sight.
Either use the standard “modes” for windows testing (mainly pie or standalone game) or I would suggest using the platforms drop down and the specific pack project once you want to test it without the editor.