the answer will be based on the customization technique:(quickprep , sysprep) and which windows you are using (win 7, win10)

quick prep normally work fine without issues , however be sure no static IP address in the gold images, and removed the Vm from the domain

normally sysprep face such issues , and  most cases because the sysprep command fail ,as start try to login in to one of the provisioned Vms from the console and run the sysprep  command