"My partner works for a small charity tied to a IT support team of 2 nerds, part of the office accommodation package that they rent. They were caught out by this yesterday when all their PCs and laptops went through the "upgrade" process, leaving them unable to do anything with them for hours. They then found that ther internet connection was unuseable and they couldn't access any of their files, which turned out to due to their bandwidth being completely overwhelmed by the automatic transfer of several years worth of local files onto Onedrive."
:-O While Windows 10 isn't necessarily a bad operating system in itself, this type of Redmond chicanery will only give Microsoft and Windows 10 a bad reputation which, in the long run, can only be counterproductive. For example, after such an experience, I can see many people opting for Chromebooks, OS X (inc. hackintoshes) and the free Windows-like Linux distributions such as Linux Mint, Zorin, LXLE and Linux Lite which pretty much work straight out of the box.