So I have finally got W10 up and running now after just going through the official download link - W10 Download
I basically just ran the set up and it went through and appears to be activated. Though I still have the $Windows.~BT and .~WS taking up a large chunk of space so about to delete those and the Windows.old folder. Also I'm going to spend a bit of time sorting out the drivers (see below) and some programs again lol (see below)
do a clean install of W10 now you have done the upgrade, this is what I did