The latest OGRE3D version is 1.11.
You can download the pre-build SDK here:
You probaby want the version that says
which requires Microsoft Visual Studio Community Edition 2015.MSVC15, x64
Here is the documentation to install the SDK:
If you want to get acquainted with OGRE you should start with the documentation resources:
I learned with the book
(nevermind the 1.7 version, it teaches the basics).OGRE 3D 1.7 Beginner’s Guide
You also have the tutorials in the Wiki to get you started, but you should have the SDK installed and a simple "Hello World" first.
If you want help specifically with version 1.7.4 (the latest 1.7.4 version, but very old) let me know.