PC Performance degrading when networked

[silver157]

Dear All

I have a strange problem, when I plug the network into any pc in my network I find that the performance of PCs is degrading, to the extent that if I need to run Autocad or 3D max I have to disable my network adapter or unplug the network cable.

Till now I can't find an analytical reason for this problem or the remedy for it, so would you please help me solving this problem?

Thanks in advance for your sincere cooperation.

Edited December 11, 2008 by tain
I adjusted your post to be more legible

[tain]

Allow me to rephrase your question in order to clarify. Any PC in your environment that is attached to the network suffers reduced performance? Is that right? Is the reduction solely in processing power or in network activity? This affects all PCs the same? Can any PC perform as expected when attached to the network?

One thing to try: If all PCs are similar or the same, you can try updating your NIC drivers.

[ I adjusted your post to be more legible ]