Usually nw drivers won't uninstall unless the hardware, ie. nw card for it, is present. There should be no harm leaving the drivers on your system. You can use any plug and play 10/100 ethernet PCI card which has Win2K driver. Pick one you can return if by chance it doesn't work. Remove old card and install new card in its slot before booting PC and letting PnP detect it. Then follow instructions to install its driver.