I've had my 5s on 8.1 since it came out but just got my new 6 plus! It came with 8.1.1 stock and I tried using Taig on Windows 8 in Parallels. I get this error even though iTunes is installed. I tried reinstalling it and nothing - even restarted windows. Is some setting off or something not installed via Parallels? I even tried PP or whatever its called to JB on the mac but that didn't work either.