[NTG-context] ConTeXt installation on Windows 10

Hello List ! Quite a dummy question : usually I use to work with CTX on Linux, but I want to install it on Windows 10 x64. Unfortunately, while I download CTX packages from there http://standalone.contextgarden.net/setup2/ , the next step fails : C:\Users\adeim\Documents\context>first-setup.bat The command returns this : "'rsync' is unknown as an internal or external command, an executable program or a command file. 'mtxrun' is not known as an internal or external command, an executable program or a command file." The same thing occurs while context is as a file at the very root on c:\, or within c:\windows, or in C:\Users\adeim\Documents\context> Many thanks for your help ! JP