Windows 10 build 16265 for PCs is now going through internally testing. The new Redstone 4 build 16265.1000 (rs_prerelease.170809-1713) was compiled on August 9, 2017. In addition, the company also compiled mobile build 10.0.15242.0 on August 8.
The Windows Insider team will not release any new build this week because of a blocking bug in internal testing. However, they may release build 16266 or build 16267 for Fast Ring members next week.
Previously, Microsoft released the Fall Creators Update build 16257.0 and Windows 10 Redstone 4 build 16257.1000 to Fast Ring insiders. The builds were released with new features, bug fixes, and improvements.
Now you can download Windows 10 build 16257 ISO from the link below.