The /prep command will permanently modify a Windows PE image, so that it can no longer be serviced. This means that operations ...

The /prep command will permanently modify a Windows PE image, so that it can no longer be serviced.  This means that operations including:     - Installing or uninstalling optional features    - Applying hotfixes or other servicing packages    - Installing language packs  Will not be possible on the prepared image.  To continue, enter "%1".  Any other input will exit the program.  Continue? %0