Microsoft to its 32-bit Windows users: Drop dead!
Microsoft has made it very clear that they'll no longer be programming to 32-bit operating system environments. Server 2012 is not available in 32-bit flavors, and future version of the desktop operating system will not be available in 32-bit.
32-bit is literally so 10 years ago. There are no modern hardware platforms produced anywhere in the world that are solely 32-bit.