Linksys LNE100TX model 5, Linksys NC100, Skymaster SK1207E, Planex FNW-9803-T, or any other network card based on the AN983B chipset by ADMtek, sometimes also sold under the no-name "Asound" or "Fast" brands. Note that this includes some motherboards' built-in Ethernet controllers, such as: MSI (Microstar) MS-6378, DFI NS70-EL & AZ30-EL, USI PM-845, Fujitsu D1451. The solution seems to be to install one of the following drivers from ADMtek: Windows XP, Windows ME, Windows 98. These are drivers from the chipset manufacturer and are Microsoft certified. Use these drivers in place of any other driver for those cards, including the latest version from Linksys.
Netgear FA311 - Try this version (1.30) of the drivers from Netgear.
Netgear FA312 - Seems to have the same problem as the FA311, but try this version (1.8) of the drivers instead. (Note that this driver should work with both the FA311 and FA312, so also try it if you have the FA311 and the above driver doesn't work.)
Alcatel Speed Touch USB DSL modem - Install these drivers.
If your network interface card (NIC) or DSL/cable modem were not listed above, then check with the manufacturer's website and make sure you have the latest drivers.