'Duplicate exists' error displayed on EVERY computer
I have a very strange problem with my network where every computer displays the "duplicate exists" error.
Essentially I can rename a computer from "ICT-2" to something completely unique, such as "ILoveLooting" and it would still throw up the duplicate exists error.
There are 2x domain controllers, one with DCHP and both with DNS (one on 2008 and one on 2008 R2 - 2008 functioning level). Neither server displays DNS or DHCP errors in Event Viewer.
Any help would be very much appreciated, this problem is slowly driving me insane!
Thank you in advance.