https://arstechnica.com/gadgets/2018/10/the-windows-10-october-2018-update-is-out-now/

The Windows 10 October Update, version 1809, is now available for Windows 10 users.

As is traditional, Microsoft will be doing a staged rollout, using machine learning to better detect issues and incompatibilities while offering the update as quickly as possible to as many Windows 10 users as possible.