The RPC Server is unavailable/XP Media 5.1 SP 3/NAV 15.5.0.23

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I'm running NAVirus 15.5.0.23 on XP Media Center v 5.1 Build 2600, SP 3.

After I installed the latest NAV update I keep getting a Help & Support popup. After I run the session I get the following message: The rpc server is unavailable. When I run the support it "fixes" the problem and  I get a message stating: RPC Service configuration fixed. The problem is this popup is appearing every 10 ~ 15 minutes; even after I fix the problem. What I have noticed is that my wireless connection drops out every so often for a few seconds and then comes back. Is there something in the latest NAV that requires a constant RPC connection?

Just doing a quick search, I found the following article from Microsoft:

http://support.microsoft.com/kb/884564

 

Does any of the information in that document apply to your situation?