It doesn't wok for me
I did all "Louis Davis" steps from 2 page.
My Arduino Micro and Arduino UNO detects as "Unknown device" in device manager
I click update driver then I select my driver location "D:\arduino-1.0.2\drivers\FTDI USB Drivers" or "D:\arduino-1.0.2\drivers"
after that I have this message:
I using Windows 8 purchased from Microsfot.
I have been the exact seem thing you have been through ,but after I did what Louis wrote again ( idk if this is necessary
) I made the following steps :
1] right-Click on "My Computer"
3]after that clicked on "Device Manager"
4]then Right Clicked on Your Arduino( From "unknown Devices" as I remember
(probably you already know about all these previous steps , But ...
5]after ,don't click on "update Driver Software" or whatever it was, but instead CLICK ON "Uninstall" .. it should disappear after that
6]Plug out then re plug in your Arduino
7]then do the "update driver software" thingy
8]after that choose in the installing that 2sterednd option in that creepy red screen " install anyway" (I think you know this one too)
I really hope that this will work for as I have even registered in this forum just to post this help
for you and
this random solution has worked for me today