Win 7 is what most of my machines run, I have one Win 10 and it isn't awful. They've removed some of the really bad things about 8, but it still keeps you from working on it until Bill has installed all the latest crap on it. He may already have 10 because most people don't know the difference. Win 7 should be good for 4-6 more years. I still have a couple of Win XP machines running, but they're seldom online and all have an up to date security suite installed. Got a good deal, 10 licenses for $100, which seems to be Norton's response to PCMatic's pricing. I also don't much like the 64 bit version of 7 and prefer the 32 bit version.
Win 10 is OK, it still runs Office 2003, which is the best version ever in IMHO. Online it says you can't run it on 10, but it works fine. I use WORD a LOT and the pull-down menus are far superior to the Ribbon in later versions -- which seem like a throw back to the menus that were in the ancient DOS version of WordStar. I have accumulated about 36 licenses for Office 2003. Not running as many machines these days, 2 XP (playback mostly), 2 Win 7 desktops and a 7 laptop and the 10 laptop. XP is to me the best GUI of all.
The more I do, the less I accomplish.