After over 28 failed upgrade attempts, that worked for me. Took around 3 hours total.
Now a big BUT, having now got Win 10 up and running, quite honestly, for me, I don't think it is much of an improvement over Win 7. It has nothing new that I find useful, in fact, at present it seems all gloss with no gain.
Mind that last statement is my own feelings at present. YMMV as they say!