Dear: These things could casue this error as follow: 1- Old version of O/S still on the device. 2- Old Active directory files. 3- Another database file like(Novel,etc..). these all the causes that influnce on this.. Best regard -------------------------------------------------------------------- You should at least of two domain controllers in your active directory environment. If you have two and one starts to act up. 1. de-promo the domain controller 2. Remove it from the domain. 3. Clean up the metadata in AD 4. Re-install the operating system 5. add it to the domain 6. Promote it to a domain controller If that server is your only domain controller, you need to add a temporary domain controller then do the steps above. This <a href="http://technet.microsoft.com/en-us/library/cc736378.aspx">link</a> will step you through cleaning up the metadata.

Dear: These things could casue this error as follow: 1- Old version of O/S still on the device. 2- Old Active directory files. 3- Another database file like(Novel,etc..). these all the causes that influnce on this.. Best regard -------------------------------------------------------------------- You should at least of two domain controllers in your active directory environment. If you have two and one starts to act up. 1. de-promo the domain controller 2. Remove it from the domain. 3. Clean up the metadata in AD 4. Re-install the operating system 5. add it to the domain 6. Promote it to a domain controller If that server is your only domain controller, you need to add a temporary domain controller then do the steps above. This <a href="http://technet.microsoft.com/en-us/library/cc736378.aspx">link</a> will step you through cleaning up the metadata.