How do I obtain Emacs for Windows?
See this webpage. In brief, after downloading the package emacs-XX.X-fullbin-i386.tar.gz (where “XX.X” is currently “21.3”) from ftp.gnu.org, unpack it in an appropriate place (e.g., “C:\Program Files”). Note that the aforementioned webpage provides information on unpacking tar.gz files under Windows. You can then invoke Emacs right away by starting “C:\Program Files\emacs-XX.X\bin\runemacs.exe”. You may wish to create a shortcut to this program.