Downloaded and partly installed before the usual error of every update since 305
Don't get me started. This was probably my worst experience with a new build upgrade for a year or more. I was stuck repeatedly here
AND it would just sit there for hours with no disk activity nor task manager showing anything of interest.
I finally just used the files that it did manage to download C:\Windows\SoftwareDistribution\Download and UUPtoISO to generate the ISO and mounted that to perform the Upgrade.
The attempt on my Hyper-V VM was even more of a disaster which I think might be linked to last Tuesday cumulative update on my primary machine that hosts all my VMs. Still researching that, but....
I ended up having to perform a clean install on that and it still is not working 100%.