You didn't give much information, so...
Give this a try -
Boot to "Safe Mode"
Access "Device Manager"
Remove all the NIC entries
Reboot the computer without the LAN card installed
Shut down - install your card - Reboot
Do the install
If your m-board has "onboard" LAN...
...make sure it is disabled in the BIOS.
Hope this helps you solve your problem
. MAKE a
day ... Pat///
I have been trying to installing a new lan card but everytime it comes up it it says the name is a repeat. it is a linksys card and i hve tried to install about three times but the same message comes up i would like to know if i need to completely redo windows xp or if there is some other way to install it

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic