I've been using Windows XP Home Edition for months now, with little trouble. Things were a bit out of whack when I had a massive Poser installation on my C drive along with everything else. I had some hard drive problems and used that as an excuse to do a totally new install of Poser on the D drive. Poser is the only program on a 30GB hard drive. I store my art there too, but that's it. My new Poser installation is lean and mean. I only installed my Michael & Vicky stuff, and whatever stuff I want to use soon. You want to have plenty of room on your hard drive. Poser does seem to bog down if you have everything but the kitchen sink installed. I had that problem with Windows ME too.