XP 32 bit. Didn't want vista cos it ate ram like a cookie monster eatin cookies. Windows 7 is same so gg to that. I spose I have 750 mb ram unrecognised anyway so it wouldnt change much at all as I believe win 7 woudl recognise all 4gb.
Anyway win 7 has no features that id use other than the compare side by side thing which can be achieved fairly quickly with some resizing on xp, win 7 seems like a big nothing to me.