How do I demote a PDC to a BDC?

Logon to the machine as an Administrator

Start the registry editor (regedt32.exe)

Move to HKEY_LOCAL_MACHINESecurity

Select Permissions from the Security menu

Select Administrators and change the access type to Full Control, check the"Replace Permission on Existing Subkeys" and click OK. Click Yes tothe confirmations dialog box

You can now navigate the Security menu, move down to PolicyPolSrvRo

Double click on the default value and change the seconddigit (which should be 3 for a PDC) to a 2 (which means BDC). Click OK. E.g.03000000 to 02000000.

You should now reset the Security on the Security part of the registryusing the same method as before but changing back to Special Access forAdministrators. The permissions for Administrators should be
- Write DAC
- Read Control

Restart the machine and it will come up as a BDC