Hi, Richard, I am running Windows XP 32 bit, Windows XP Pro 64 bit, and, at the moment, Ubuntu 10.04 in Virtual Box. Every "just works", including the web, usb attachments, etc.. I recommend it. This is the non-free Sun version, though, as I didn't have a lot of luck (it was some time ago) with the packaged version. YMMV HTH Terence