http://docs.mongodb.org/manual/tutorial/install-mongodb-on-windows/
There is documentation about the 64 bit build not running on 32 bit machines. We need similar wording clarifying the 2 flavors of the 64 bit build.
What we currently call the 2008+ build (BUILDBOT-168 filed to rename this) will only run on Windows 2008 R2 or Windows 7 and beyond. Also the document should be changed to reflect that users should use this build if running on either of these two flavors. Additionally from Windows Azure perspective, if using Worker or Web role this build should only be used when osFamily is set to to 2.
osFamily = 1 is compatible with Windows 2008 and
osFamily = 2 is compatible with Windows 2008 R2.