While using my Windows Deployment Service running on Windows Server 2012 to deploy new Windows releases (Windows 8.1 and Windows Server 2012 R2, I had errors when deploying Windows images using WDS, with or without answers file.


Windows could not apply unattended settings during pass [offlineServicing]

After validating the WIM image by installing both version by booting on the DVD to confirm the image is not corrupted, I though this may be related to the boot image used to start the OS deployment; so I updated the boot image used on WDS by the one from the ISO file and… it works Smile

So, if you plan to deploy Windows 8.1 and/or Windows Server 2012 R2 using WDS, update your boot image.