Microsoft yesterday released Windows 10 Insider Preview Build 17723 (RS5) to Windows Insiders in the Fast ring and Build 18204 (19H1) to Windows Insiders who have opted in to Skip Ahead. With this build, Microsoft is trying to fix one of the most annoying things about Windows Update process, reboots during unexpected time. Microsoft has now updated its reboot logic to be more adaptive and proactive.
The new reboot logic is based on a predictive model that can accurately predict when the right time to restart the device is.
For example, this new system will not restart your PC if you are using it and it will also try to predict when it can restart the PC based on your past activities on the PC. If you take a long lunch break everyday, the system will predict the idle time and restart during that time period. Microsoft tested this new system internally and found positive results upon rollout.
If you find your device restarting at the wrong time when running this build, file a bug in the feedback hub with the details on your experience so that Windows Update can further train their update model.