Acer aspire 4720z wireless card problem

Hi guys, i have trying to repair an acer laptop for a friend, they had installed windows XP because they did not like Vista, but now the wireless does not work, i thought it would be a simple affair as i had recently fixed another friends IBM by going to the site and downloading the drivers, but in the case of this Acer, i am not sure which wireless card it has in, the acer website lists atheros, broadcom, and intel wireless drivers, i believe i have tried all three with no luck, in device manager it is also showing the "network controller" as needing drivers. Can someone guide me in the right direction with this?

Thanks a lot in advance.

 

this any use.http://rds.yahoo.com/_ylt=A1f4cfnH2...cer/acer+aspire+4720z+network+adapter+driver/

 

or this.http://rds.yahoo.com/_ylt=A1f4cfnH2...8867-i-need-all-drivers-for-acer-aspire-4720z

 

Flavallee, under other devices there is "network controller" and "unknown device". I assume i need to sort the network controller but i can't seem to find drivers for that, or is the network controller referring to the wireless adapter? Keep in mind regular wired connection works, its only the wireless that is not installed..