Plug [Q] odin on windows 8 laptop.....I'm lost

Ive to root an lte note 2 with a windows computer what is the easiest way doing it, is to put the s5 rom on it for my cousin and it is the blind leading the blind....tried it earlier and odin wasn't playing ball if possible have you a link or a noob guide of doing it also my tab 3 is bricked and I'm completely lost of how to get the software back on...when i downloaded odin it installed stuff i didnt need on the computer...im new to all this and any help would be great.Brian