https://arstechnica.com/gadgets/2017/10/latest-windows-release-already-on-five-percent-of-windows-10-pcs/

A week after its release, the Windows 10 Fall Creators Update is already on five percent of Windows 10 machines, according to numbers provided by AdDuplex.

The previous Windows 10 update, the Creators Update, was given a very slow rollout as Microsoft sought to avoid problems faced in last year's Anniversary Update. Five months after its release, it was only on two thirds of Windows 10 machines, and now, at what is likely to be its peak, it's on three quarters of Windows 10 systems. The Anniversary Update itself is still installed on 17 percent of machines. In contrast, the Anniversary Update was on some 92 percent of Windows 10 devices when the Creators Update shipped.