Well windows 7 is great, unless you install something it hates, i was installing Autodesk 3DS MAX on 64-bit and it compleatly froze my OS, and it would never boot again, if i tried to re-install windows it would get to windows setup and BSOD on me lol, so ive got my spare 400gb hdd in now with 32-bit on, great everything working, BSOD'd, i sit and diagnose it and find it's teh damn nvidia drivers, it took me a day to get it fixed lol, the only ones tht stop the bod are the ones windows downloads itself, apparntly there are problems with 190 according to what ive seen on the net, oh well, i fixed it now lol, now to see if i can reteive stuff of my other 3 hdds, joys =3.