cannot start project from launcher file extention missing from windows

As described when i try to start my project from within the launcher i get this error “This files does not have a program associated…”

Diging a bit deeper i found that the necessary file extension ‘.uproject’ is missing in windows, this is a brand new instillation of Windows and Unreal Engine, it looks like a fault with Unreal Engine in that it simply failed to install the extension and so Windows doesn’t know what to open it with…