The processing of Group Policy failed

Dear Support,

I am using windows server 2003 as our domain controller, and having 2 more ADC on branches,

we are already using GPO for our network, but when i try to do some changes it is not applied on win 7 and win 8,

when i try to do gpupdate /force , it is going me following error

---------------

C:\Users\xxxxxxxx>gpupdate /force
Updating Policy...

User policy could not be updated successfully. The following errors were encount
ered:

The processing of Group Policy failed. Windows attempted to read the file \\xxxxxx\SysVol\hqdom.dom\Policies\{1A63FDF6-582A-49C3-9CEF-945F6D50BAA4}\gpt.ini f
rom a domain controller and was not successful. Group Policy settings may not be
 applied until this event is resolved. This issue may be transient and could be
caused by one or more of the following:
a) Name Resolution/Network Connectivity to the current domain controller.
b) File Replication Service Latency (a file created on another domain controller
 has not replicated to the current domain controller).
c) The Distributed File System (DFS) client has been disabled.
Computer policy could not be updated successfully. The following errors were enc
ountered:

The processing of Group Policy failed. Windows attempted to read the file \\xxxxxx\SysVol\hqdom.dom\Policies\{1A63FDF6-582A-49C3-9CEF-945F6D50BAA4}\gpt.ini f
rom a domain controller and was not successful. Group Policy settings may not be
 applied until this event is resolved. This issue may be transient and could be
caused by one or more of the following:
a) Name Resolution/Network Connectivity to the current domain controller.
b) File Replication Service Latency (a file created on another domain controller
 has not replicated to the current domain controller).
c) The Distributed File System (DFS) client has been disabled.

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.

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Ali SJ -MCITP 2008-