I believe it was originally Q Dos, but no matter. Vista continually crashed my ‘old’ Latitude C640 which had 2 gig RAM. I just got a Latitude D630, dual core Centrino, 4 gig RAM and an nVidia video card. It seems to handle Vista Business 64-bit just fine, and I haven’t run into any driver problems yet. I’m still learning Vista but have to agree - it’s a RAM hog. XP Pro is still just fine and other than a few whiz-bang gadgets, I see nothing with Vista worth the $$ at this time.
Mac is much better. Everyone knows it. But you don’t get all the fancy software.
The jackasses at IBM thought the money was in the hardware years ago.