God alone knows what MS is thinking of . . . they made updating to 10240 so difficult, by ensuring that WU does not resume from where it left off, if your download is interrupted for any reason. I was once on 60% when I decided to complete the update later, and I was shocked to find that I had to start from scratch. The 2nd time, I was on 33% when the wifi signal broke off briefly, and the damn thing started from 0 again. I gave up trying WU and downloaded the torrent file instead.
Win10 seems so amateurish right now, with no solidity. You never know what will work and what won't, and what was working earlier won't stop working all of a sudden. I am amazed that MS thinks that 10240 is good enough for RTM.