I have a new Lenovo G710 Laptop with UEFI bios and Win8 Pre-Installed. I want to make a clean installation of Win8 so I can change patition C & D sizes and get ride of all un-wanted pre-programs. My Qs are: 1) where I can find Win8 ISO file to download? (Microsoft and Lenovo) didn't wand to give me one 2) Assume I have ISO File and create Bootable USB Drive, Does my pre-installed key work? I cannot download Win8 using Microsoft procedure to download win8 with Key (I discovered my key using key finder program). I don't want to make recovery media from current state of laptop.