Also, These instructions helped me get over the hurdle of not seeing my device when typing adb devices. Not sure if I didn't have the folder and file to begin with or if it was hidden. Either way, when I attempted to create the .android folder it appeared with the said file in it and the correct 0x1949 line in it. After that it worked great! saved me hours of frustration i'm sure
4. Hold down the Windows key and press R to bring up the run dialog and type %USERPROFILE% then click OK.
5. Open the .android folder.
6. Open the adb_usb.ini using Notepad or Wordpad.
7. Type 0x1949 at the end of the file, then save and close adb_usb.ini. (Note, some people are saying the ‘X’ has to be upper-case in order to work. See comments.)