Which Windows?
3.1, 95, 98, 98SE, Me, NT3, NT4, 2000, XP? They get progressively intolerant of being switched, especially with a simple mechanical switch. With Windows 2000 I've only been able to switch video. Keyboard & Mouse get totally screwed up. With previous versions only the mouse gets screwed up.
[link|http://www.aaxnet.com|AAx]