I was using a DWA 140 wireless dongle from D-Link on XP and it worked fine. However, after installing the drivers repeatedly in Windows 7, I cannot get it to work. Looking in the device manager section, it shows up under its proper name. It's enabled. Properties reveals there are "no problems" with the device. However, when it comes to configuring wireless adapters from the Networking page in Control Panel, the item is greyed out and marked as "disabled". I double click and get a box that says "Enabling" then a couple of seconds later it changed to "Enabled" and goes away, but it's still greyed out and disabled. I've searched for drivers and picked up the most up to date RAlink drivers for this chipset, and it still won't work. So, exasperated, I tried my old WMP54G from Linksys. Installed, picked up and......exactly the same problem. Disabled and cannot be enabled. This is an entirely new build on new hardware, not an upgrade from XP. I just get the impression there a "Enable Wifi?" check box somewhere I need to tick, but I don't know where. Or how. If anyone can help, I'll be eternally grateful.