Error when connecting to Windows Server 2003 using Remote Desktop

Solution 1:

Create the following Registry key

HKLM\System\CurrentControlSet\Control\Terminal Server
Name: IgnoreRegUserConfigErrors
Type: REG_DWORD
Value: 1

Reboot the server, and try logging in via RDP.

Solution 2:

Are there any other errors in the event log, not related to terminal services? We need to determine if this is a problem with Terminal Services, or with the RPC service.

I have often seen this error 'TCP/IP NetBIOS Helper' service running? I've often seen the fact that this service was stopped cause this error.

The fact that you have an error accessing your group policy file may be related. One thing you can try is to check if "File and Print Sharing" is enabled on the adapter your trying to RDP too, if its not, turn it on and see if you can connect then.