Problem:
The task sequence stops at the ‘Setup Windows and ConfigMgr’ task and the web reports or log files have an error message of “The task sequence execution engine failed executing an action”.
Solution:
This usually occurs when the required network drivers are not available for either the WinPE boot image or Windows 7.
You will need to add the network drivers into Configuration Manager and update your boot file/image.
See SCCM – How to add drivers to WinPE boot image for detailed instructions.