WSUS client stopped reporting, hangs

So this one user who is on a Tablet PC (shouldnt patter) running XP stopped reporting to the WSUS back on the 9th. The other 13 computers in the office are reporting fine.  The client's computer also hangs for a long time (5 minutes) when logging into windows.

In the Event Viewer I receive the following error in the Application log:
Windows can't determine user or PC name (The RPC server is unavailable.) Group Policy processing aborted.

I've looked for an RPC service but dont see one. I've checked the TCP/IP settings and it's set to auto. It has a network connection.  The PC's name is the same name that WSUS should have.  Server is Win2003 std and is a WSUS. Any ideas?
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DonNetwork AdministratorCommented:
Run the "Network Identification Wizard" to ensure its joined to domain correctly.
run this batch to reauthorize to WSUS server.

%Windir%\system32\net.exe stop bits 
%Windir%\system32\net.exe stop wuauserv 
%Windir%\system32\net.exe stop cryptsvc

del %WINDIR%\WindowsUpdate.log /S /Q  

reg delete HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate /v AccountDomainSid /f
reg delete HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate /v PingID /f
reg delete HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate /v SusClientId /f
reg delete "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\Auto Update" /v LastWaitTimeout /f
reg delete "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\Auto Update" /v DetectionStartTime /f
reg delete "HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\WindowsUpdate\Auto Update" /v NextDetectionTime /f

rd /s /q %windir%\softwareDistribution
%Windir%\system32\net.exe start cryptsvc
%Windir%\system32\net.exe start bits 
%Windir%\system32\net.exe start wuauserv 



wuauclt /resetauthorization /detectnow
wuauclt /reportnow

exit /B 0 

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TymetwisterAuthor Commented:

Network Setup Wizard won't let me run it cause it says it's part of a domain, so that's working.  I ran that batch, it ran through okay and afterwards I got the windows popup that updates were successfully installed, however I still don't see an updated "Last Reported" date in Update Services, and it still hangs for about 5 minutes on startup.  I know that Update Services can sometimes take 24 hours to reflect changes, however I am still seeing the initial error in the event log.
TymetwisterAuthor Commented:
Well, the band-aid fix was to point the DNS directly to the server IP, and that cleared up the login issue... still don't know if the machine is reporting, haven't been back to check.

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Windows Server 2003

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