The official MS-Windows port homepage from gnu.org is http://www.gnu.org/software/emacs/windows/ntemacs.html . Many issues concerning Emacs and MS-Windows are treated there. The page has also links to the precompiled binaries for MS-Windows of the current Emacs or earlier versions.
If you want precompiled binaries for the latest Emacses (version 23.2 is officially released stable; v24 is in early development phase) please see CategoryWThirtyTwo.
Project ntemacs at (http://ntemacs.sourceforge.net/) provides clean, optimized binary builds of the latest Emacs bzr snapshot, with image support enabled and necessary dependencies bundled in the package.
If you want to install Emacs on MS-Windows using a simple installer, you may have a look at the following ressources:
See CategoryWThirtyTwo for a lot more.