FWIW I intially had all sorts of problems with the Netgear wnda3100v2 USB wireless unit. I initially thought it may heve been a problem with my 7800N wireless channel selection but I finally traced it to the fact that I had it plugged into a USB port on a card reader in my desktop, for no other reason than it was easy to get at. I believe it was seeing it as a hub, and it didn't like it. Once I could be bothered to crawl around under the table and plug it in to one of the mobo USB ports on the i/o panel everything was fine, and has been for ages now.