I was trying to sysprep a Windows 7 image (build: 7201)

Everytime i started the sysprep process, it was fail with the error: “A fatal error occurred while trying to sysprep the machine.” seems to be a problem with the windows media player. (wmpnscfg.exe) after killing the process, the deployment process ran smoothly.. had to kill it twice once, seems to be starting again after some time… in my case i had to kill the process twice..