Question : Windows cannot query for the list of Group Policy objects . A message that describes the reason for this was previously logged by this policy engine.

I have this as first error in my application log
Event Type:      Error
Event Source:      Userenv
Event Category:      None
Event ID:      1000
Date:            12/4/2008
Time:            2:00:11 AM
User:            NT AUTHORITY\SYSTEM
Computer:      WESTTENN-SERVER
Description:
Windows cannot query for the list of Group Policy objects . A message that describes the reason for this was previously logged by this policy engine.


followed by

Event Type:      Error
Event Source:      Userenv
Event Category:      None
Event ID:      1000
Date:            12/4/2008
Time:            2:05:12 AM
User:            NT AUTHORITY\SYSTEM
Computer:      WESTTENN-SERVER
Description:
Windows cannot connect to wtn.xxxxxx.net with (0x2747).


then


Event Type:      Error
Event Source:      Userenv
Event Category:      None
Event ID:      1000
Date:            12/4/2008
Time:            2:12:30 AM
User:            NT AUTHORITY\SYSTEM
Computer:      WESTTENN-SERVER
Description:
Windows cannot determine the user or computer name. Return value (14).


In Security log i have

Event Type:      Warning
Event Source:      NETLOGON
Event Category:      None
Event ID:      5781
Date:            12/4/2008
Time:            2:18:04 PM
User:            N/A
Computer:      WESTTENN-SERVER
Description:
Dynamic registration or deregistration of one or more DNS records failed because no DNS servers are available.
Data:
0000: 2a 23 00 00          

And in DNS Server log i have

Event Type:      Error
Event Source:      DNS
Event Category:      None
Event ID:      4000
Date:            12/4/2008
Time:            7:58:29 AM
User:            N/A
Computer:      WESTTENN-SERVER
Description:
The DNS server was unable to open Active Directory.  This DNS server is configured to obtain and use information from the directory for this zone and is unable to load the zone without it.  Check that the Active Directory is functioning properly and reload the zone. The event data is the error code.
Data:
0000: 3a 00 00 00               :...    


This started happening recently  once in 3 days time and when i restart the My server which is DC and DNS also i think it fixs the issue and people can remotely log in and use it.


Ipconfig/all says this...
Windows 2000 IP Configuration

        Host Name . . . . . . . . . . . . : westtenn-server
        Primary DNS Suffix  . . . . . . . : wtn.xxxxxx.net
        Node Type . . . . . . . . . . . . : Hybrid
        IP Routing Enabled. . . . . . . . : Yes
        WINS Proxy Enabled. . . . . . . . : No
        DNS Suffix Search List. . . . . . : wtn.xxxxxx.net
                                            xxxxxx.net

Ethernet adapter Outside:

        Media State . . . . . . . . . . . : Cable Disconnected
        Description . . . . . . . . . . . : Intel(R) PRO/1000 XT Server Adapter
        Physical Address. . . . . . . . . : 00-02-B3-D3-8B-08

Ethernet adapter Inside:

        Connection-specific DNS Suffix  . :
        Description . . . . . . . . . . . : Intel(R) PRO/1000 XT Network Connection
        Physical Address. . . . . . . . . : 00-06-5B-FE-14-CB
        DHCP Enabled. . . . . . . . . . . : No
        IP Address. . . . . . . . . . . . : 192.168.3.2
        Subnet Mask . . . . . . . . . . . : 255.255.255.0
        Default Gateway . . . . . . . . . : 192.168.3.20
        DNS Servers . . . . . . . . . . . : 192.168.3.2
                                            209.210.150.8
                                            67.136.243.254
        Primary WINS Server . . . . . . . : 192.168.3.2

I did go through some solution but that didnt exactly suit me.. Please help

Answer : Windows cannot query for the list of Group Policy objects . A message that describes the reason for this was previously logged by this policy engine.

In the TCP/IP Properties, in Advanced, on the DNS tab, is your local DNS server (192.168.3.2) at the top of the list?

Did you already see http://support.microsoft.com/kb/259277 ?

Also http://support.microsoft.com/kb/311354 and
http://support.microsoft.com/kb/252695

And, though less-likely,
http://support.microsoft.com/kb/193888
i.e.  add DNS as a dependency for NETLOGON service.