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An existing connection was forcibly closed by the remote host.

Last Modified: 2012-05-10
I administer an Ethernet LAN consisting of about 50 WinXP Pro workstations and about 5 Windows 7 workstations.  To keep an inventory of all this, I use "Asset Tracker for Networks" by Alchemy-Lab.com running on a SERVER 2003 machine.  The software works great with the WinXP machines, but refuses to inventory any of the Win 7 Machines, stating instead: "An existing connection was forcibly closed by the remote host."

All machines have Symantec Endpoint Protection installed and use its firewall rather than the Windows 7 firewall which is disabled. Disabling Endpoint Protection does nothing.  The Administrator account is enabled on all machines.  All machines can be Pinged from all other machines.  The inventory software is configured to access all machines via IP number, not DNS.  As far as I know, the GPEDIT settings are not blocking anything.

On one occasion, I did get an EVENT ID 50 on the server.  This looks like it may be the culprit, but why only on Windows 7 machines?
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