Updating windows without validation
In some situations, outstanding reboots can cause sysprep to fail. It is essential that Windows is in an absolutely stable state before you run sysprep.However, I believe the most likely reason for the above error message in Windows 10 is that sysprep ran into problems with the new Windows apps.
Make sure that you understand these concepts if you are working with Windows 10 images.
These apps are still somehow alien to Windows, and you have to treat them with great caution in your reference image.
These are the possible causes for app-related sysprep failures that I am aware of: The bottom line here is that, whenever a discrepancy exists between installed and provisioned apps, sysprep will not be able to validate your Windows installation.
Alarm Clock HD_220.127.116.11_neutral__7jhd16s0b93qm was installed for a user, but not provisioned for all users.
This package will not function properly in the sysprep image.