quite simple configuring https - working with openssl

THis is a quite basic question, and I am not sure why i haven't been able to solve it.

Essentially in this guide http://ift.tt/1seQTIy

I am trying to get pass by the following step: Enter the path to the OpenSSL installation:

c:\ set OpenSSL_HOME=path_to_your_OpenSSL_installation

In particular, path_to_your_OpenSSL_installation When I downloaded and install openssl the folder it is found c>OpenSSL and all its files is found inside that folder, I am not sure how to configure that path.

Another question I have is whats the point of geotrust, or verisign if you can use openssl as https for free.