Windows 10

Last night my computer randomly and without my permission upgraded itself to Windows 10. I upgraded to 10 several months to check it out and didn't like it and so went back to what I had. I don't seem to be able to do this time. I really don't not like anything that Windows 10 has to offer. It would be nice if Bill Gates let us decide which version we use rather than force it on us. I was fine with what I had and now I have to deal with this new, screwed-up version called Windows 10. My sister has a Mac and has been saying I should get one of those. Maybe I will look more seriously into that option - where at least I have a choice - something that Windows didn't give me.