Microsoft is now rolling out Windows 10 build 17744.1004 as an update described as KB4462775 for devices enrolled in the Slow ring of the Windows Insider Program.
KB4462775 is just a small update that bumps the version number to build 17744.1004, and fixes a reliability issue where restart warnings aren’t displayed for user-scheduled update restart, and addresses a problem with the Security Configuration and Analysis snap-in for Microsoft Management Console does not list System Services.
According to the company, update KB4462775 is rolling out using a new package that has been designed to download and install more efficiently.
If you’re enrolled in the Slow ring, you can check all the improvements in this guide, and you can also check out this video review.
Download Windows 10 build 17744.1004
Although there are no ISO files for Windows 10 build 17744.1004, the update is available immediately through the Slow ring. This preview build will download and install automatically on your device, but you can always force the update from Settings > Update & security > Windows Update and clicking the Check for updates button. (You can learn how to join the Windows Insider Program on this video.)
You can also check out these resources: