A few days ago I was visiting family, and my Mom was online Skyping relatives on her Windows 7 PC. She comes running into the other room and says her PC just restarted while she was talking, and now it says something about configuring Windows 10, even though she was always careful to opt-out of the constant requests to upgrade. So, we had to wait for it to install the OS, then decline the terms of service, then wait…
With Windows 10 latest version I was unable to disable a particular update which fails every time. So Windows will reboot regularly, including waking from sleep to do so, and fail to install, leading to 30 seconds plus reboot time at best to get it to wake up. For a tablet.
Since bought a new laptop and installed Linux on it as my main operating system for the first time (dual booting) and am pretty happy so far. Updates no longer reboot the computer for the most part. Missing a few features (especially hibernate), but most things work as well or better than Windows so far.