Hello!
I bought the Archer T2U and encountered the same "can't find the adapter" issue like many other users. OS is Win 10, 64 bit. The adapter works in a "plug and play" regime, but it's very slow and unstable (it goes offline every several minutes) compared to the other devices in our network (one laptop and 2 phones). The PC works well on a wired connection to the same router but I need to use it in a different room. I feel that at least in this case the Windows driver might be insufficient so I need to install the TP-Link driver. I've tried both the CD and the one from the site with the same results. I belive I should be able to install the official driver, otherwise it's useless. Please advise.