Cannot remove a Windows 2008 server as a domain controller

I tried running dcpro.exe to demote a windows 2008 server as a domain controller.  However I got the following error message

Active Directory Domain Service Installer
Failed to detect if Active Directory Domain Services binaries were installed.  The error was:  Element not found.

Any idea what caused the problem and how to fix it.
zry700Asked:
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zry700Author Commented:
I installed the system update readiness tool on the server, and I can start DCPROMO.exe.  However I am getting the following error message In Active Directory Domain Services Installation Wizard

The operation failed because:

Active Directory Domain Services could not transfer the remaining data in directory partition
DC=ForestDnsZones, DC=NameOfOtherDomainController, DC=local to Active Directory Domain Controller \\NameOfOtherDomainController.domain.local.

"The directory services is missing mandatory configuration information, and is unable to determine the ownership of floating single-master operation roles."

How to fix this problem?  In case I cannot demote this domain controller using DCPROMO.exe, can I remove it manually from Active Directory?  Thanks,
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Wayne88Commented:
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DeadmanIT ConsultantCommented:
It looks FSMO role is been seized from the failed DC, but its metadata cleanup has not been performed.
My suggestion is use dcpromo /forceremoval and perform metadata cleanup to remove the dc. You can refer below article to remove references of earlier removed dc from the AD.

https://support.microsoft.com/en-us/kb/216498
https://awinish.wordpress.com/2011/05/08/metadata-cleanup-of-a-domain-controller/
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Wayne88Commented:
Thanks for the points zry700

Deadman, nice try.
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