While in Japan I've been using a "Nextbook" featuring Windows 10.
This (ahem!) "operating system" ought to be prohibited by law.
First of all, you can't turn Cortana off. I've tried, and it still pops up to offer me useless bullshit.
Moreover, what the hell is with Microsoft's hatred of Unicode? I actually got into an argument with a friend employed in the tech sector, and it's actually quite funny because if anyone else talked about anything else that way, he would be entirely pissy about the arrogance of presumption. But he's in tech, so when he says, "But you don't need Unicode", he means it in the same way the tech sector tends to think it knows what people want or need, and if you want or need something the tech sector thinks you don't, you're wrong.
Windows 10 is shite. Microsoft is shite. The first purpose of Windows is to facilitate the needs of commerce. A user's actual needs are not necessarily on the list of purposes or priorities; that is to say, if one's needs happen to overlap with something Windows 10 does, one should feel lucky.
(Facebook, Wordpress ... it's not like Microsoft is unique in setting user priority to "fuck you". But they are Microsoft. Automattic's claim to power over a quarter of the internet notwithstanding, they're still following the MS lead. You know, just for instance.)