Vista - Drops Network when large file copied to PC

Ok here is a rather bizzar problem and I am hoping to eventually solve it
without hopefully having to reinstall the OS. I have a media center running
Vista Ultimate (upgraded from Vista Home Premium about 6 months ago), this
problem has been occuring for about 4-5 months. If I try to copy a large
file over the network to the media center by initiated the transfer from
another PC the media center will drop off the network and I have to either
disable and reenable the NIC or restart the PC both have the same effect of
bringing it back on the network. Now the odd thing is I can copy the file
just fine if the transfer is initiated on the media center. I have tried
disableing the Kaspersky antivirus, there is no firewall running and the
windows firewall is turned off, upgrading the NIC drivers, upgrading the ATI
chipset drivers, and have upgraded to Vista SP1, all with no apparent effect
on my problem.

Any help is appreciated, I may contact MS support if no one has a suggestion
because I really don't want to have to do a clean install of Vista on it,
though that may be where I am headed.

My workaround was to temporarily drop the Speed setting on the NIC
properties to 10 Mbps Half duplex for the transfer. You may find a faster
setting, but this is what worked for me. The 'auto-negotiation' seemed to be
the problem.

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Mark L. Ferguson
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"Joe" <Joe@xxxxxx> wrote in message
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