Which version of Windows you are using now?

my higher end laptop and desktop i have at home, im running windows 10. i dont really care what windows i have/use. i always adapt to it anyway. plus, anything i dont want, i can remove with registry tweaks, etc. now, for my 3 MVP laptops i have, they are running elementaryOS linux. without veering off topic, all 3 laptop (which are pretty old but very fast because of updated hard drive and rams), im running virtualbox with windows 7 alongside with 2 other programs some of you may have used as well for certain things.