Windows 7 not installed through Windows Deployment Server. Our Model e7440. We have download the latest cab driver and added in WDS. The error shown when completeing stage

"sysprp sppnp: error 0x25 (configret) occurred while determining the buffer size needed to hold the list of devices that are using service Acceler.
sysprp sppnp: error 0x25 (configret) occurred while opening to handle  to the service Acceler. [gle=0x00000424]"