Update Windows details in README.md

Closes #4184

README.md

@@ -18,9 +18,12 @@ Running the Tests
 =================
 
 The tests are designed to be run from your local computer. The test
-environment requires Python 2.7+ (but not Python 3.x). You will also
-need a copy of OpenSSL. Users on Windows should read the
-[Windows Notes](#windows-notes) section below.
+environment requires [Python 2.7+](http://www.python.org/downloads) (but not Python 3.x).
+You will also need a copy of OpenSSL.
+
+On Windows, be sure to add the Python directory (`c:\python2x`, by default) to
+your `%Path%` [Environment Variable](http://www.computerhope.com/issues/ch000549.htm),
+and read the [Windows Notes](#windows-notes) section below.
 
 To get the tests running, you need to set up the test domains in your
 [`hosts` file](http://en.wikipedia.org/wiki/Hosts_%28file%29%23Location_in_the_file_system). The
@@ -80,17 +83,24 @@ Running wptserve with SSL enabled on Windows typically requires
 installing an OpenSSL distribution.
 [Shining Light](https://slproweb.com/products/Win32OpenSSL.html)
 provide a convenient installer that is known to work, but requires a
-little extra setup.
-
-After installation ensure that the path to OpenSSL is on your `%Path%`
-environment variable.
-
-Then set the path to the default OpenSSL configuration file (usually
-something like `C:\OpenSSL-Win32\bin\openssl.cfg` in the server
-configuration. To do this copy `config.default.json` in the
-web-platform-tests root to `config.json`. Then edit the JSON so that
-the key `ssl/openssl/base_conf_path` has a value that is the path to
-the OpenSSL config file.
+little extra setup, i.e.:
+
+Run the installer for Win32_OpenSSL_v1.1.0b (30MB). During installation,
+change the default location for where to Copy OpenSSL Dlls from the
+System directory to the /bin directory.
+
+After installation, ensure that the path to OpenSSL (typically,
+this will be `C:\OpenSSL-Win32\bin`) is in your `%Path%`
+[Environment Variable](http://www.computerhope.com/issues/ch000549.htm).
+If you forget to do this part, you will most likely see a 'File Not Found'
+error when you start wptserve.
+
+Finally, set the path value in the server configuration file to the
+default OpenSSL configuration file location. To do this,
+copy `config.default.json` in the web-platform-tests root to `config.json`.
+Then edit the JSON so that the key `ssl/openssl/base_conf_path` has a
+value that is the path to the OpenSSL config file (typically this
+will be `C:\\OpenSSL-Win32\\bin\\openssl.cfg`).
 
 Alternatively, you may also use
 [Bash on Ubuntu on Windows](https://msdn.microsoft.com/en-us/commandline/wsl/about)