I'm having the same exact issue. Bought mine today from BestBuy. I'm running a brand new rig, Vista 64/Intel i7, don't know if that has anything to do with it, but I plugged it into the MB, ran the drivers, and it actually froze at 95%. I left it for about 10 minutes, still was frozen. So I rebooted, everything booted up fine, but as soon as I connected to my network, whole thing froze. Tried uninstalling and installing in a different PCI slot, same issue. I called DLINK, and they were pretty useless. The guy told me to take a pencil eraser and kind of clean the contacts... supposedly to remove a static charge. I dunno. A buddy of mine has one and his works fine. Might return it for another one, or I might try the DWA-556, maybe the pci-e version isn't as lame.