I own retail versions of
WinXP Pro
WinXp Media Centre, which of because of the time it was bought was given free upgarde so..
Vista Home (is that the one with medica Centre ?)
Also Own Win7 Pro, pre-ordered for massive discount
Vista Home OEM
I have run inthe past
Pirated versions of 3.11, 95, 98, 98SE, Windows Milenium and Win 2000