DCOM Event ID 10009

The system event log in one of my PCs is recording the following error
message every 40-45 seconds against two other PCs in my wired network. The
other PCs are not recording such an error.

DCOM was unable to communicate with the computer %1 using any of the
configured protocols.

Event ID 10009

This is not a new PC and it has been running this configuration for several
months. The best I can determine is the problem started 2 weeks ago around
the time Norton Ghost and eTrust Firewall were installed. I have installed
tested and reinstalled both products but the problem existed in all
combinations.

The defined network file shares and printer shares are working. There are no
old printer share definitions defined anywhere.

The registry entry for rpc DCOM protocols is ncacn_ip_tcp followed by
ncacn_spx.

Virus scans are negative.

The problem does not seem impact performance. The PC is running Windows XP
Home Edition SP 2. The other PCs being named in the error are running Windows
XP Home Edition SP 2 and Windows 98 SE. All critical fixes are up to date on
all PCs.

These PCs are not using Exchange, Outlook or SQL Server. The configuration
is a simple home network using a Linksys wireless route with a 4 port switch.

Any ideas on how to debug this problem would be appreciated.

.

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