Windows 10 has pretty much all the drivers you'll need no matter how old your pc is. Of course, I'm talking no older than say an Amd X2 dual core or an Intel D 945 or something like that. And of course providing you have at least 2 GB of ram, it will run fine.
Otherwise, its by design. They don't want people staying on older versions of windows 10, they only want to support at most 3 different versions, the last 3. Some of the version updates include security patches that fix holes that could be exploited in previous versions.
Win 10 isn't like Win 7, its constantly being developed. Unlike 7, you don't have to install the original version every time and update it, you can download the latest build and only download max of about 5 patches. That beats Win 7 which needs about 300 if you clean installed it now.
That and updates only install if there is anything on your PC that needs an update. Once a month isn't that hard really.
you can't turn them off but they no where near as bad as they were on 7.
I've used XP, 7 & 10 extensively, but hated 8 & 8.1 with a vengeance. Utterly rubbish! I marginally prefer 10 now but did think in some areas that 7 was more user-friendly. Also, if like me you enjoy playing older PC games (for XP or older), 7 is much easier. But honestly, once you get used to 10 it's fine.