Microsoft is now testing Windows 10 build 17079 internally. The new Redstone 4 (v1803) Update build 17079 (10.0.17079.1000 rs_prerelease.180112-1650) was compiled on Jan 12, 2018. This build might roll out to insiders this week.
Windows 10 build 17074 is now available for Fast and Skip ahead insiders. This build includes new features and enhancements for Microsoft Edge browser and Quiet Hours. In addition, the new insider preview build has also added a brand new “App volume and device preferences” page.
The ISO files for Windows 10 build 17074 are also now available for download. You can download it from the link below.