From day 1 I started to have problems with the computer losing WiFi connection and the yellow exclamation mark appearing or the TL USB adapter disappearing from the network adapters. To fix the problem I have to unplug and plug the adapter again. This happened both in Windows 7 x64 and Windows 8.1 x64.
It's definitely a problem with the computer since I've tried the wifi adapter in other computers and it worked just fine.
I already unchecked the "Allow the computer to turn off this device" and also disable USB selective suspend.
What could it be?