Naming Information Cannot be Locaqted for the Following resaon, DC 2008 R2

Yesterday one of my domain controllers in my domain which is a single domain, with two domain controllers throw up the error when opening Active Directory Users and Computers 'Naming Information Cannot be Located for the following Reason'.

I am not sure what is causing this error but the other DC is running normally.

If anyone has any ideas your thoughts are appreciated.
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Will SzymkowskiSenior Solution ArchitectCommented:
I would start by making sure that the following services are started on that server.

- NetLogon
- Active Directory Domain Services
- Active Directory Web Services

Check the Directory Services Logs on that domain controller

Run the following commands as well on that troubled DC.

repadmin /replsum
repadmin /showrepl
repadmin /bridgeheads
dcdiag /v
netlogon query dc
netlogon query fsmo
net share

carlocAuthor Commented:
Could this be related to this error, on the same machine I ran windows power shell, but it can back with this message;

"Insufficient winsock resources available to complete socket connection initiation".

Will SzymkowskiSenior Solution ArchitectCommented:
It is quite possible. Did you run the other commands that I have listed in my first post?

Darius GhassemCommented:
A few quick things to try:

1. Make sure your firewall or antivirus software isn't blocking access.

2. Go thru the below link

3. Reboot your DC see if it's just a network hiccup that needs to be cleared.

4. Reset your Winsock but make sure to copy down TCP\IP settings before proceeding.

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Windows Server 2008

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