The biggest issue for Win10 is that they should have left the update thing unchanged from Win7. So you can select updates, or just get information about it and then decide what to do. The most stupid thing MS did with their new operating system.
The other part is they removed the Win7 colors, you can add them but still irritating that the windows of each program has a strange color. Or bars at the bottom etc.
These two issues are serious problems to me, otherwise they fixed most of the bad things from win8 and win8.1 and it could have been better but win10 is at least usable.
The dumb thing is, they could fix these issues easy with upgrades and be done with it.
If I can not disable updates with a hack or tool I am not interested in using win10, I do not want updates installed or new drivers, just because windows things they are better. That should be up to the users what to do.