New Wireless Adapter Problem

I just got a Rosewill RNX-N180EUB wireless adapter, but it won't work. I'm pretty sure I know what the problem is, my old adapter's drivers are conflicting with the new ones. But I don't know how to go about removing those old drivers. I've looked around in Device Manager, but I can't find anything. I also don't know what kind of an adapter it was because it came with the computer, and it doesn't say on the side.

I'm using Windows 7 64bit and I tried the latest drivers from Rosewill's site with no luck.

in device manager, choose driver tabs, try to update driver and choose new driver location, or uninstal driver, and then execute new driver.

Already tried it, didn't work.