If your WDS server gets into a state where it can't be started, you can use the WDSUTIL utility to restore WDs to its initial state by running the following command from an elevated command prompt:
Next, re-initialize the service by running this command:
Then configure WDS settings as needed for your environment.
Mitch Tulloch is a seven-time recipient of the Microsoft Most Valuable Professional (MVP) award and widely recognized expert on Windows administration, deployment and virtualization. For more tips by Mitch you can follow him on Twitter or friend him on Facebook.