Did mine yesterday via Windows Update, which took well over an hour. No problems on my rather old desktop, apart from a small issue with my monitor profile, which would change every time I went from windowed to full screen in Prepar3Dv4.1 [flight simulator] making everything very dark and oversaturated... Ticking 'Disable Fullscreen Optimizations' on the P3D exe seems to prevent it.
Other than that, all seems well.