Adapter Enabled But Unable To Add Computer To Wireless Network

I recently entered the realm of wireless networking for my desktops and was able to connect my personal desktop successfully. Unfortunately, the other desktop I really need to make wireless is having difficulties. The computer never shows the message that a new device is discovered/installed. The adapter shows up under hardware devices and functioning properly but this is not the case. I installed the driver from the included CD but when I use Windows to troubleshoot, it says that the driver and adapter aren't working. When trying to set up a new network, I get a grayed-out wireless icon in the system tray and can't proceed. I disabled the firewall and antivirus so I could start over, uninstalling the driver, restarting and installing again.