Tried to get my PC to detect the USB adapter, but with no luck. I'm running Vista, and Kaspersky Internet Security 2010. I uninstalled the Kaspersky program, and reinstalled the WDA3100, and my PC detected it right away. No problems at all, and it works brilliant. Reinstalled Kaspersky when it was up and running with no problems with the WNDA3100. If you have the same problems give it a try, it works.