I fixed my problem. I have a Linksys v5 NIC card. I read that ADMtek actually makes the chipset for them, so I just downloaded the ADM driver and the problem stopped. I've done about 6 isos and all is well so far.
For anyone else with this problem, here's where I got the new driverhttp://groups.yahoo.com/group/BitTorrent/message/1365
To install it...
Go to your Device Manager, then go to Properties of your Network card, then click on the Driver tab, then Update Driver button, then select driver to install manually (advanced), then Don't Search, then click on the Have Disk button and go to the folder that has the driver files which you downloaded.