Windows XP on one partitian and Windows 2000 on another partition, normally alternating between the 2, depending on what I actually want to use my computer for.
been toying with the idea of having an additional Linux operating system on a 3rd partition, don't know what I'd do with it, but been toying with the idea, I guess just to try something new.
Linux has so many less flaws its awesome. But a lot of things are not compatible with it. I am running several things that had to do with my home business on it though. Runs very smoothly.