My Windows is 10 Professional and it is original. I also thought about updating it to Windows 11, but I decided to update Windows 10 to the latest version. I was kind of sad when I downloaded UE5 and Nanite didn’t work showing that message, but I kept trying to solve that problem. I tried first using “Vulkan API” instead of DirectX 12. The shaders began to compile and I could see the meshes of the buildings, streets cars. You can do that to see, but “Vulkan API” it seems can’t use Nanite or Lumen. There’s a video from the guys at Epic Games talking about “Vulkan”, but I haven’t watched it yet. If you decide to use “Vulkan API” just to test, be sure it takes a long time to compile the shaders. You will see the City Sample beginning to show, but it’s just for the test. Nanite and Lumen work with DirectX 12.