Lost Network Adapter

[Shevone936]

Please help!

I have somehow managed to remove the network adapter from my PC.

I updated my PC to Internet Explore 8 and uninstalled some unused programs which were taking up memory space.
After this I could not connect to the internet.

My network connection is only showing dial up and I have lost the LAN. Under Device Manager I am not showing any Network adapters. It only says Ethernet Controller with a question mark and exclamation mark. I have clicked this and tried to re-install but it is not working.

I have been told to download a driver and re-install but I really don't know what I am looking for or which driver to select.

My PC is a Dell Optiplex 320 and I am running Windows XP.
Unfortunatly I do not have any disks that came with the PC as I bought it second hand.

Does anyone have any advice on how I can fix this as I am lost without my broadband.

Thank You