I have 5 machines that are all identical, all Windows XP Professional 64. All were setup using the same ghost image which was take of 1 of the machines. Unfortunately sysprep was not run before taking the image so when all the machines were setup they all had the same name, on the same domain, with the same SIDs. Upon booting up the each machine, i removed it from the domain, changed the name and then rebooted. Then i added it back into the domain. I was under the impression that this would create new SIDs but i don't think it has. We are now getting user errors when trying to login to these machines saying the computer/user has been locked out. I assume this has something to do with duplicate SIDs in Active Directory. Does anyone know how i can resolve this problem? How can i renew the SIDs for each machine?