You have to check your motherboard model.

Do I need to physically open up my PC and find it or is there a software I can use?

I use Everest software in that situation but you can catch something else.

My motherboard, http://uk.gigabyte.com/products/product-page.aspx?pid=2669#bios

What now?

Hi

I have just bought the WDN4800 and had major problems getting it to work with my Win7 64bit machine.

Eventually, I found the answer (Kindly provided by Sharon in this forum). Uninstall the drivers you have put in from the mini disc then turn off your machine (you can leave the card in situ).

Start your machine again. Just as windows is starting, press f8. This will start the machine in a basic mode. When the text window opens, use your keyboard down arrow and select 'safe mode', press enter. When windows is loaded, place the driver disc in the machine and load the drivers.

When complete, restart you machine. You should find that all is now working and you can select the router you want and connect as normal. Don't forget to tick the 'Connect Automatically' box before making the final connection to your network.

Hope that helps.