Pages not generated with Hugo 0.79+ on Windows

Of course it works. You need to add it to the Windows Path before executing. There are detailed instructions over here.

What kind of birthday should Hugo Extended know? :face_with_monocle:

In any case we cannot know what you mean in your post above without you providing a link to the source code of your project, or if you cannot share the actual project, then please share a project that reproduces the issue you encountered with dummy content.

Also for future reference please do have a look at the forum Requesting Help guidelines.