I am still running XP. I have a copy of Windows 7, which I can now upgrade to 10 for free, but I have never installed it and I am still running XP for some reason. I don't really know why other than it still works without any problems from any programs or games that I use. It probably has to do with spending years on XP and tweaking all the settings to the point of getting it just how I want it and not having much insentive to change. Also, XP only takes up 3.5GB, where the newer versions can be 15 to 20 GB. I'm really not sure why the OS needs to be that big when XP seems to do everything just as good.