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Event ID: 4000 Source: fwdrv

The description for Event ID ( 4000 ) in Source ( fwdrv ) cannot be found. The local computer may not have the necessary registry information or message DLL files to display messages from a remote computer. You may be able to use the /AUXSOURCE= flag to retrieve this description; see Help and Support for details. The following information is part of the event: <error description>
I experienced exactly the same error, and it appeared to be caused by a dialer that was attempting to dial a Premium call rate website. Adaware and Spybot Search&Destroy did not fully remove the problem, but a scan by CA EZ antivirus detected and removed Win32.SilentCaller.N and Win32.Rbot.DAR viruses and solved the problem.
Various reported errors:

- \Device\FWDRV, FwDrvProtGetMediumConnected: FwDrvProtInit error: .. - no info
- Anther TDI hook handler detected - please remove i. - no info
- PersFwDrv: MsgDigestCalculate: Unable to allocate memory for file. - no info
This is caused by Tiny Personal Firewall. Uninstalling and reinstalling with updated version seems to resolve the issue.

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