Yes, he is running WIN7. We have preached and preached about upgrading getting everyone upgraded to Win10.
I will say this , a little birdie told me over at PBBans that the reason so many people are being caught in while running Win7 is because there are not that many cheats out there that work with Win10. Only a very few of the hack cheat sites advertise Win10 cheats.. So they don't upgrade. Take that for what you will.