KB2952664 won't uninstall

It's free to use now but what happens when that time is over and you want to go back to Windows 7. Now the hell starts.

MS has a habit of having a big-time winning OS, followed by a flop Win 10 is really very good - but I'm struggling with finding any real reason to move from Win7 unless you have touch-screen capability.

MS intend to make their money out of selling the Apps that people seem to love installing on their machines, and selling advertising space inside the free apps. It really is that simple.
They will also be saving bucketloads of cash because...
1) there won't be so many operating systems to support once Vista dies in 18 months - Windows 10 is scheduled to be a never-ending update so after 2023, they'll only have one OS to support (in theory!)
2) One of the big changes in Win10 is that updates can be channelled through P2P rather than having to always come from the MS servers. This should reduce their server requirement significantly (and here we're talking in the millions of dollars per year).

The fly in the ointment is the Volume License customer - who won't make the change for years yet, and is possibly still wedded to XP. MS will try to get them to bypass 7 and 8 and move straight to 10. I don't see that happening until 7 goes out of support in 2019/20

lol yea x-p to win-10 would be a drastic transition

Yep it's been stated in the terms to go back you'd need to clean install,
Most of the :Not genuine: questions popping up after using 10 system restore OEM SLP posts kind of prove that I'll bet.
A lot of OEM owner do not have clean install disks so they have to go to the manufacture to plead the case how to reactivate the OEM now

The vast majority of non-genuine cases I see after downgrading from Windows 10 are caused by having been counterfeit before the upgrade - the upgrade/downgrade cycle breaks the Activation Exploit that had been previously used to make the system look genuine.

Very good point Noel.

I do remember Microsoft stating that a counterfeit W-7 could move to W-10
BUT they never said when you went back to W-7 the hack would still work.

I think it might be a gotcha or a sneaky by Microsoft.

Sounds like a lot of interesting phone calls to both M$ and manufactures and or sellers of the media in question :)