While the April Update had the fastest Windows 10 update rollout velocity, we are taking a more measured approach with the October Update, slowing our rollout to more carefully study device health data. We will offer the October Update to users via Windows Update when data shows your device is ready and you will have a great experience. If we detect that your device may have an issue, such as an application incompatibility, we will not install the update until that issue is resolved, even if you “Check for updates,” so you avoid encountering any known problems. For those advanced users seeking to install the update early by manually using “Check for updates” in settings, know that we are slowly throttling up this availability, while we carefully monitor data and feedback.