That has to be it. Until those are installed, you're going to keep getting that error. Is there a usb icon in your task bar by the time? I couldn't get pdanet to work until I was prompted to install drivers when I plugged in my phone.
Does anyone know how to force the pc to do that?
Tapped from a Galaxy Nexus
hmm when your in bootloader with adb open you can type "adb devices" (without quotes) if nothing is replied its a driver issue, although, i had the driver issue and never got the error you are getting, it just didnt do anything
if you open the windows icon thing on the bottom left of your pc, find the pdanet folder and choose "install legacy usb driver" then try it if it fails reboot your pc and try it again.
i have this same issue, even though i got my phone flashed, i still have to play with that driver every time until it decides to work.
i also read somewhere that the newer 3.0(whatever) doesnt play nice with what were doing sometimes, i am going to try a legacy 2.(whatever) version to see if it works better, when i get a chance.
ill try and find that page if you want to try an older version bbiaf