Hi there.
It would help knowing what kind of driver is causing the problem (Mass storage driver, Sound,...)
Possible causes/fixes:
* Sysprep causes a Plug and Play detection and searches in c:\windows\system32\drivers first. The driver might have originally been installed from point A, but is also present in the windows library, which takes over.
* You have a pointer in your sysprep.inf file to a failing driver (e.g. mass storage section)
* If you haven't already, add the DriverSigningPolicy=Ignore to the [Unattended] section of your sysprep.inf. The driver may not have been signed.
* Install the latest driver for the device, preferably directly from the manufacturer (Intel, Broadcom, Nvidia,...)
Hope this helps!