There seem to be two issues here,
1) The comuputers have the same name
2) The computers have the same GUID
I'd hazard a guess that the machines have been imaged with the same GUID so AJ's pointer to the shared GUID tool kit is a good start.
Obviously, we are all cringing in horror that all the machines are also sharing the same name... but I'm sure Sudarshanp knows what he's doing!
Kind Regards,
Ian./