Thanks for the replys everyone. I've been reading all day for info on both Vista and Maya's compatibility. Your absolutely right when you said its up to who you talk to. It looks as though you can probably run 7 on a 64 bit system, but it wouldnt take much to get things "jumpy". As far as Vista is concerned, I'm not sure if Maya 7 is compatable, I would think as long as its 32 bit it should, but with windows... who knows until Autodesk lets us know.. and if not... will there be an update available for all of us who spent alot of money and want to keep working. I"ve decided to stay with 32 bit because most of my other 3D apps and helping apps will surely be OK, just need to see if Vista or XP Pro would be best. Now I have to see if I can send back 4GB of ram!! ( I have 8 Gigs ready to install!):headbang: Thanks again and I'll be watching for any more info from everyone.. especially on Maya 7 and Vista...Respond if you have it running !!