When you login to a domain you get the following error:
Windows cannot obtain the domain controller name for your computer network. (The specified domain either does not exist or could not be contacted. ). Group Policy processing aborted.
and the GPOs are not applied.
Here is the solution:
Windows XP Service Pack 2
After you apply Windows XP Service Pack 2, you must add the GpNetworkStartTimeoutPolicyValueregistry entry. This entry defines the number of seconds to wait before trying to run the Group Policy startup script again. To find the value that will work for your configuration, define a decimal value of 60, and then increase the value until the problem is resolved. To add the registry entry and to define the value, follow these steps:
Click Start, click Run, type regedit, and then click OK.
Expand the following subkey:
Right-click Winlogon, point to New, and then click DWORD Value.
To name the new entry, type GpNetworkStartTimeoutPolicyValue, and then press ENTER.
Right-click GpNetworkStartTimeoutPolicyValue, and then click Modify.
Under Base, click Decimal.
In the Value data box, type 60, and then click OK.
Exit Registry Editor, and then restart the computer.
If the Group Policy startup script does not run, increase the value of the GpNetworkStartTimeoutPolicyValueregistry entry.