I've just installed a wireless PCI adaptor (Tenda W322P 11N) in my desktop PC but I can't 'enable' it - every time I double click it starts to enable then stops and leaves it disabled with no warning or error messages. The system is definitely seeing it as it's listed in Device Manager, and if I bring up Network Connections (using ncpa.cpl) it's listed and shown as disabled. Why would windows stop it from being enabled?? I've tried downloading new drivers from the manufacturers site in case the drivers on the disk were old - no difference. I uninstalled it and removed the drivers and then re-booted so windows would use it's own drivers - no difference. It seems the system has a problem with it, but surely ONE of the drivers would work if it was a driver problem?