Perform the following steps:
Double-click on the downloaded setup file to get started with the installation.
The first and second steps of the installation process are self-explanatory. It first greets you with a welcome message and informs you about the "safe to follow" procedures before installation, that is, to close all other opened applications before continuing (just to avoid the remote chance of any shared dll/exe being overridden or a simple case of your system running out of memory, which is required in large amounts whenever you perform an installation). Then it shows you the details about the GNU public license Version 2 by which our Git is governed.
Clicking on the Next button on the screen brings us to the following screen, which gets your preferred location for the installation: