Microsoft has now pushed Windows 10  Redstone PC Build 14390 to Windows Insiders in Fast Ring. The Build as expected doesn’t bring any major noticeable new features but does bring fixes and improvements. There is one known issue with this Build as well. Read on to check the official changelog and known issues below.

Improvements and fixes for PC:

  • You should no longer see the error code 0x80004005 when enabling Developer Mode on the “For Developers” Settings page if your PC is using a non-EN-US language.

Known issues for PC

  • AWARENESS: A recent fix went into place for the Hyper-V firmware that will that affect the ability to boot Windows Server 2016 Tech Preview 5 VMs with Secure Boot enabled. A fix for TP5 builds has been developed however, due to release schedules, the Insider Preview build changes will be released before the TP5 fix is released. During that time, if you try to boot a new TP5 VM with Secure Boot enabled, it will fail. The workaround is to disable Secure Boot during this period.