As mentionned in the comments, their installation is pretty much the same across Windows 8, 8.1 and 10 computers, but I prefer a slightly different method.
Chocolatey offers simple and straightforward installation on Windows 7+. The downside is, you need administrator account access. The
emacs package there is not always up to date, but it gets updated pretty regularly.
To use this method, open elevated Cmd/PowerShell and install the
choco package manager first, then update environmental variables:
and install either emacs64 package (which I recommend, if you have 64 bit Windows 10):
choco install emacs64
or emacs 32-bit:
choco install emacs
Now you can start Emacs from the start menu, or manually from the default location
C:\ProgramData\chocolatey\bin\runemacs.exe. To update Emacs, use
choco update emacs64 or
choco update emacs.