To upgrade to the new build, follow the steps with your install of Windows 10 9879 or you can download the ISOs using the links at the bottom of this post.
- Click on the start menu and in the search box type 'Windows Update'
- Chose 'Windows Update Settings'
- In the left panel click 'Preview Builds'
- Click on the 'Check' now.
- Download the new build
Download: Windows 10 buld 9926 English: x86 | x64 | More versions