Processing of Group Policy failed - User Policy - Windows 7

Question

OP:
http://social.technet.microsoft.com/Forums/en-US/w7itpronetworking/thread/191f1ee1-a551-446b-9808-ff66a952bb25
When running a gpupdate I get the following message:
Updating Policy...
User policy could not be updated successfully. The following errors were encount
ered:
The processing of Group Policy failed. Windows could not authenticate to the Act
ive Directory service on a domain controller. (LDAP Bind function call failed).
Look in the details tab for error code and description.
Computer Policy update has completed successfully.
To diagnose the failure, review the event log or run GPRESULT /H GPReport.html f
rom the command line to access information about Group Policy results.
This only happens on one computer under a certain account; other accounts work fine and the problem account works fine on other computers. Therefore the problem is located on the Windows 7 computer.
I have tracked it down to an LDAP error code 49. 
I tried the MS sollution (http://technet.microsoft.com/en-us/library/cc727283(v=ws.10).aspx) but the credentials are sound.
I can also connect to the DC with LDP.exe fine. 
Here are the diagnostic read outs (GPResult was too long to post):
Log Name:      System
Source:        Microsoft-Windows-GroupPolicy
Date:          2/29/2012 1:56:09 PM
Event ID:      1006
Task Category: None
Level:         Error
Keywords:     
User:          Domain\UserAccount
Computer:      Win7-ComputerA.FQDomain
Description:
The processing of Group Policy failed. Windows could not authenticate to the Active Directory service on a domain controller. (LDAP Bind function call failed). Look in the details tab for error code and description.
Event Xml:
<Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
  <System>
    <Provider Name="Microsoft-Windows-GroupPolicy" Guid="{AEA1B4FA-97D1-45F2-A64C-4D69FFFD92C9}" />
    <EventID>1006</EventID>
    <Version>0</Version>
    <Level>2</Level>
    <Task>0</Task>
    <Opcode>1</Opcode>
    <Keywords>0x8000000000000000</Keywords>
    <TimeCreated SystemTime="2012-02-29T19:56:09.732842600Z" />
    <EventRecordID>32458</EventRecordID>
    <Correlation ActivityID="{CECE6DDC-E7CC-4563-8109-E62382F645D4}" />
    <Execution ProcessID="984" ThreadID="3688" />
    <Channel>System</Channel>
    <Computer>Win7-ComputerA.FQDomain</Computer>
    <Security UserID="S-1-5-21-416373151-1271962822-2142307910-40105" />
  </System>
  <EventData>
    <Data Name="SupportInfo1">1</Data>
    <Data Name="SupportInfo2">5012</Data>
    <Data Name="ProcessingMode">0</Data>
    <Data Name="ProcessingTimeInMilliseconds">1326</Data>
    <Data Name="ErrorCode">49</Data>
    <Data Name="ErrorDescription">Invalid Credentials</Data>
    <Data Name="DCName">
    </Data>
  </EventData>
</Event>
Windows IP Configuration
   Host Name . . . . . . . . . . . . : WIN7-ComputerA
   Primary Dns Suffix  . . . . . . . : FQDomain
   Node Type . . . . . . . . . . . . : Hybrid
   IP Routing Enabled. . . . . . . . : No
   WINS Proxy Enabled. . . . . . . . : No
   DNS Suffix Search List. . . . . . : FQDomain
                                       ParentDomain
Ethernet adapter Local Area Connection:
   Connection-specific DNS Suffix  . : FQDomain
   Description . . . . . . . . . . . : Intel(R) 82579LM Gigabit Network Connecti
on
   Physical Address. . . . . . . . . : 00-21-CC-5F-CF-DF
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes
   IPv4 Address. . . . . . . . . . . : 216.71.244.28(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.255.0
   Lease Obtained. . . . . . . . . . : Wednesday, February 29, 2012 12:38:25 PM
   Lease Expires . . . . . . . . . . : Thursday, March 01, 2012 12:38:24 PM
   Default Gateway . . . . . . . . . : 216.71.244.1
   DHCP Server . . . . . . . . . . . : 216.71.244.2
   DNS Servers . . . . . . . . . . . : 216.71.244.2
                                       216.71.240.120
                                       216.71.240.132
   Primary WINS Server . . . . . . . : 216.71.244.2
   Secondary WINS Server . . . . . . : 216.71.240.130
                                       216.71.240.122
   NetBIOS over Tcpip. . . . . . . . : Enabled
Wireless LAN adapter Wireless Network Connection:
   Media State . . . . . . . . . . . : Media disconnected
   Connection-specific DNS Suffix  . :
   Description . . . . . . . . . . . : Intel(R) WiFi Link 1000 BGN
   Physical Address. . . . . . . . . : 8C-A9-82-B0-67-E8
   DHCP Enabled. . . . . . . . . . . : Yes
   Autoconfiguration Enabled . . . . : Yes

Answer 1

Hi,
It sound like port blocking issue, Seems your client system connecting 216.71.240.x DNS Servers as a logon server and which seems on different subnet
as per subnet mask, So there must be a router or firewall in between and so it might be Active directory ports are being blocked.
So first for testing purpose just remove other
216.71.240.x DNS
servers from TCP/IP configuration and clear dns cache
ipconfig/flushdns
and restart the system. check if it works.
or run this command on DC
dcdiag /test:dns
and share the error report.
Cheers!
Sanjay