I've just bought a quadcore laptop with windows 7 home prem x64 And I use FsRepaint which is 32bit :(So as I got a 500gig HDD built in I decided to install Xp x32 just to run Fs9 and everything to do with it.And FSX runs real sweet on windows 7. Well actualy the both do, the only reason I've done that is to be able to paint again for Virtual Evergreen and xp uses less resorces.Hope this is of help to someone :)