ethernet controller

i have a 32 bit acer aspire laptop with an AMD processor. It had windows vista OS. The OS was corrupted so we put windows 7 OS. However, the drivers for the ethernet controller are lost now. The only detail about the ethernet controller i am able to get is "Physical device object name: ntpnp_pci0022". pls help from where can I install the drivers. I am not able to find info on the acer site. The wireless drivers are working correctly...
pls help...

You should vist the official site of acer and get all the necessary drivers from there so thats what you should be doing over here, i hope you did understand what i am saying here. Go and vist the site and search for the necessary drivers.