trilion sending packets on workstation

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we have a workstation connected to windows server 2003. Periodically it will
hang while browsing the internet.
When this happens I can not ping sites from other workstations on the same 8
port switch. Upon checking the network status , it reveals that the
offending workstation has over a trillion sending packets and 700 received.
If I restart the offender the packet count is normal.


Any ideas on the cause?


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