I Believe I have Found a solution to this problem. Like all ov ya I was stuck with an unrooted Tesco Hudl, Tried everything already you haven't tried but then I installed Samsung USB drivers and kablam it worked like a charm. I got me a rooted Hudl now. Love my new custom ROM. I use Windows 8.1 and I had no problems using this driver to complete the Hudl driver installation.
Try and download for Samsung note 3.
To get the Samsung drivers click here: http://androidxda.co...ung-usb-drivers