Sounds like netbios activity. Who's the master browser. (me no me NO ME!)
Try turning off netbios.
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"terminal2000" <(E-Mail Removed)> wrote in message
news:135d801c419f1$fb997f10$(E-Mail Removed)...
> I met a problem.
>
> Our LAN is being adjusted and repaired.So sometimes the
> networking would be interrupted for a short time.But it is
> not completely interrupted(the local connection is still
> on,there is bytes send out but never receive).
>
> During this time,the usage of CPU would be very high(from
> 60% to 100%,varies from different machines).The prosessor
> using CPU is "System"(NOT System Idle Prosessor).
>
> If the network wire is pluged out,the machine would be
> OK.The CPU usage would be down.Pluged in the wire,CPU
> usage becomes very high again.
>
> My network adaptors is RTL8029AS and RTL8139C.
> There is NOT a single virus or trojan in my computer.
> All the patches have been installed properly.
> All the drivers have been installed properly.
>
> This happens on machines running W2KSP4 and WXPSP1.
>
> Can any one help me?