I have had problems with this upgrade - problems I didn't want as didn't ask for free version as being cynical I know no such thing as a free lunch.
I looked for answers and tried various advice to rid myself of it - meanwhile Online Armour my firewall was and still is blocking it daily. I have updates on check and let me choose as no longer trust them. They downloaded GWX when I didnt ask for it but must have been disguised as read what it says at the side and said for Windows 7 and Desk did remove these files. Then told me not to download the KB3035583 & KB2952664. But there is still a bit in here as OA Firewall blocks it daily and looking in 64 bit programs files inside "Windows" is one called "Migration" and it is in there om another file called WTR. I haven't tried to get rid of it as no idea how. Or even if can as couldn't earlier ones took M$ themselves to do it. What I dont like is this uncertainty of them sneakily not saying that the update is W10 but on the side of updates says for W7 so one is led to be live it is just that but now look at info and not always clear there either - latest is though so maybe they have had enough complaints.
Anyone is same predicament and knows how to get rid of Migration etc - I would be grateful.

Or maybe its no Migration that is being blocked. But all I can find - after M$ did the removal of what had to be whole thing ready to go and from having it on auto update which cannot do now or may get it again.
They have gone without millions of dollars by giving it away so has to be a far greater payoff in collecting all our data - say wont use it except for own purposes - but after the forcing it on people who dont want it - well can we trust them ever again.
The data collecting thing is a big turnoff for many , my biggest issue with Win 10 was the whole layout , metro app's , (hate it) and MS has taken away so much personal preference customization control users have had in the past .
Not being able to easily remove a lot of the programs was the biggest reason i had to go back to Win 7 , there is so much stuff built in to it that i have absolutely zero interest in .
Regarding the spying , i don't like it at all but i could of probably tolerated it if i liked my Win 10 experience (ran fine for 6 weeks) just hated the whole layout of Win 10 .
I was on "Wilder's Security Forums" the other day reading up about MS and the whole spying thing again regarding Win 7 specifically .
Well , i ran across a few long posts that displayed very detailed info about what MS is really collecting from users in Win 7 and especially Win 10 and it blew my mind completely .
Wilders regulars sounded like they were in shock , i had to read through it a couple times to make sure i understood it but it's unbelievable , much much worse than i could ever have imagined actually .
I wish i could link it but there would be an uproar for sure, not allowed i got in trouble in the past for that but it's from extremely well respected sources and it's very in depth about what , where , who and how often and i don't think anybody would say this is OK behavior.
MS is hiding a ton about what their really doing according to this info.