Ancient-Red-Dragon: You might as well start using Windows 10 now.
Because you can't resist it forever. Sooner or later, new hardware & drivers & programs won't be compatible with Windows 7 or below, so you'll have to change OSes at that point, despite how much you may not want to. So might as well get it over with now IMO.
Sure you can. I'm never putting Windows 10 on any of my hardware. I'll stick with Windows 7 and Linux (Mint).
MS have been trying really hard to force people to Windows 10, for years now, and there is a reason for that as Windows 10 is basically more or less a USA government spytool.
It can be an ok OS in terms of GUI (much better than Windows 8 was), and sure you get the 'free' updates and support going forward, but you will be paying for that 'freedom' with your personal data. Now if you think that is fine, or ok behaviour from an OS provider, then sure enjoy Windows 10 going forward.
If on the other hand you would not, for example, want to install a Chinese OS due to concerns over government prying, then maybe Windows 10 is not such a good idea?
For me it was when they forced Windows 10 on my mother's Windows 7 laptop about two years ago, without any clear notification what it was doing. That was a huge line in the sand MS crossed right there.
Then all the information came out about Xbox One spying on your living room (and MS having to publicly say they removed that!), then all the info on the levels of telemetry and data-gathering WIndows 10 does, and how MS can (and do) simply switch it all back on whenever there are updates.
This is not why i have an OS. So basically screw MS at this point. They are not a company to be trusted at all anymore. And yes i know it is 'fashionable' these days to not care about your online privacy and all that, it is just not a 'culture change' i can get behind.
So going forward my PC's will be Linux with Widows 7 for games (and when new games won't work on 7 i will look for Linux versions, or simply not buy - so many good games out there i'm sure i can live without 'Fortnight 7 ultimate loot crate edition' etc).
Windows 10 is a bad OS, a spyware OS. There has never been a better time to try Linux out, or a better reason imho. Start with the sticked thread on these forums and also give Adamhm's Linux Mint guide a look:
https://www.gog.com/forum/general/adamhms_linux_mint_beginners_guide/page1