T41 has Network Controller problem

I was given a T41 2373-7JU that I loaded with XP Pro. My problem is it will not  connect to the internet via it's browser. In Device Manager it shows a Network Controller problem and I've been unable to correct this no matter how many different drivers I've tried. Also, how do I tell if there's an internal  wireless card inside?  It did connect to the internet earlier today using my USB adaptor but now I can't even do that anymore. I've tried a dozen or so solutions without any success so where should I go from here?

Hi and welcome to the forum!
Following are the drivers you need for Ethernet and wifi card (and yes, as per support page there's an internal card installed in your system):-
http://www-307.ibm.com/pc/support/site.wss/document.do?lndocid=MIGR-62922
http://www-307.ibm.com/pc/support/site.wss/document.do?lndocid=MIGR-42683
To install the drivers successfully, you need to run the .exe setups from C:\Drivers.... for each device after the first setup completes.
For ethernet, the setup is in C:\DRIVERS\Win\ETHERNET\PRO1000\Win32 and for wifi C:\DRIVERS\WLLANCSC.
Hope this helps.
Maliha (I don't work for lenovo)
ThinkPads:- T400[Win 7], T60[Win 7], IBM 240[Win XP]
IdeaPad: U350
Apple:- Macbook Air [Snow Leopard]
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