This article will walk through resolving the issue of the first action after CTOS failing (usually installing the agent) when deploying Windows 10.
Provisioning fails at the first action in the system configuration area of the template when deploying a Windows 10 (Build 1703) image.
This appears to be an issue first discovered with Windows 10 Creator's Edition 1703.
A link to a discussion on a Microsoft website for more information is below:
There are currently two working solutions:
1.) Include "<SkipMachineOOBE>true</SkipMachineOOBE> <SkipUserOOBE>true</SkipUserOOBE>" in the oobeSystem part of the unattend file being used (this is included by default in the LD_Default_Unattend.xml).
2.) Add a reboot with 100-second delay as the first action in system configuration area