Hello cyndilynn
OK, my friend, don't fret. Let's find out what the skinny is. First things first...
(01) Do you have the manual for your router?
If not, you can download it from
HERE.
(02) Do I understand you correctly that you are able to connect to the Internet from one of your computers and not the other WHILE using the Linksys BEFSR41 router?
Some points to clarify:
(A) Your Linksys
router (connected between your cable or DSL modem and your computer(s)) and your Linksys
NIC (installed in your computer) are two different animals that serve different purposes.
(B) Your router should be connected to each of your computers via "straight through" (not "cross-over") Ethernet
patch cables that run from the
LAN ports at the back of your router to a NIC connection on each of your computers.
(C) The NIC and the ROUTER do not have to be made by the same manufacturer (in this case Linksys). Manufacturer's NICs and ROUTERs can be mixed and matched just fine.
I suspect the issue is w/ detection of your NIC on one of your computers. I doubt the issue has anything to do w/ your router.
If that is the case, please, provide details about the two desktop computers that you have tried the Linksys NIC in (one successfully, one unsuccessfully).
(03) What operating system is each computer running?
(04) Has the computer that you have been unsuccessfull connecting to the Internet through the Linksys router ever been successfully connected to the Internet?
For now, please, answer these 4 questions and provide any other information you can think of (the more details the better). Then we'll move on to the next step.
Thank you
BJ