Today, we are releasing Windows 10 Insider Preview Build 17623 (RS5) to Windows Insiders who have opted into Skip Ahead.
Win 10 Insider Preview build 17123 is released to Insiders on the Fast Ring. Microsoft blog gives details: https://blogs.windows.com/windowsexperience/2018/03/16/announcing-windows-10-insider-preview-build-17123-for-fast/
We fixed an issue resulting in a bug check with the error message SECURE_KERNEL_ERROR in recent flights.
As of Build 17063, a change was made that may have caused some older drivers to not load properly. This may have caused update failures or bugchecks (GSODs) shortly after the PC was rebooted. This build includes fixes for this that should prevent these update failures and bugchecks from occurring.