Alert for most recent MacBook Air and Pro owners: Apple updated a support document last Friday (2/25) indicating that these machines are only capable of running Windows 7 via Boot Camp; XP and Vista versions are no longer supported.
Anyone trying to install one of the earlier versions of the Microsoft operating system is likely to have serious problems, because Apple no longer includes the necessary drivers in Boot Camp.
All versions of Windows 7 are compatible (Home Premium, Professional, Ultimate, etc.), both 32 and 64 bits.
(via ZDNet)