when you install wm66e in windows 8 it will prompt you with "Driver installation failed" error..just allow the installation to finish..after that go to Program Files\SMART BRO\Driver then you will find this folders Win8_32 or Win8_64..choose between them depending on your OS..now inside the folder right-click these files cmntnet.inf, cmnumdm.inf, cmnuser.inf and select install..install them according to my sequencing ..