Alright, here's my quick and dirty review after using Windows 10 for about.. 10 minutes.

It's a piece of shit.

What was nonexistant in 7 and manageable in 8.1 has taken over: Integration of rubbish that I don't want or need. W10 came preinstalled with a dozen apps from the 'Store', had its Explorer window busied by a bunch of new icons and groups such as OneDrive and non-removable libraries while computer drives were hidden away under the name & icon for my PC. Mandatory updates, as was already discussed, also came in at a running start and managed to annoy. There is now a schism between standard (what we know as) Windows user interfaces and a weird kind of half-tablet, half-desktop UI that controls Action Center and some other things. You can't turn Defender off, and neither can you remove proprietary services like OneDrive and others from various places where they now reside, self-satisfied that we're surely going to use them. The new 'old' start menu also falls between the cracks. It's a bit tidier as a popup, but the 'all programs' submenu is completely unusable. Windows Update telemetry and other sniffing services remained after the update, and I didn't even have them installed previously, as I was using a full update DVD to try and do it cleanly.