The deregistration of some DNS domain controller locator records was aborted at the time of this domain controller demotion ...

The deregistration of some DNS domain controller locator records was aborted at the time of this domain controller demotion because the DNS deregistrations took too long.  

USER ACTION  
Manually delete the DNS records listed in the file '%SystemRoot%\System32\Config
etlogon.dns' from the DNS database.