Last week Microsoft released build 16299.15 for Fast Ring. Now Microsoft has pushed a same Fall Creators update preview build for insiders in Slow Ring. The Build 16299.15 is now available and can be installed. The build comes at a time when Microsoft is looking forward to intensifying the final round of testing for Fall Creators update. Very soon insiders may be treated with the Fall Creators update RTM build.

This is the minor update over the last Build 16299. Microsoft seeks to establish this build with a cumulative update so it seems that it is the RTM Build.

UPDATE 10/2: We have released Windows 10 Insider Preview Build 16299.15 to Windows Insiders in the Fast ring. As we prepare to release the Windows 10 Fall Creators Update to the world on October 17th, we will now start testing out servicing this build with the Cumulative Updates via Windows Update.

If you want to download the ISO images of build 16299.15 then click here