I’m forced to use Windows for my work PC (and our IT department will be providing me with a new Windows 10 image soon).
However, this is why I switched to Ubuntu Linux for my personal computers. The initial install is free (both “as in freedom” and “as in beer”), as are the updates, which I can install as I see fit.
A few years back I installed Linux on an old laptop for my parents to use — it does what they need it to do (e-mail, internet, Facebook, some basic games), and now they would probably be lost if I gave them a PC running Windows 8.1/10.
Microsoft forced updated to 10 on my fathers business computer. I have pulled my hair out since. It is one bug after another and now lags with certain programs and didn’t before the upgrade. I have 10 at work and at home, prefer 7.