Some documentation updates.

Author: ekpyron

docs/installing-solidity.rst

@@ -300,7 +300,10 @@ Or, on Windows:
 
 .. code-block:: bat
 
-    scripts\install_deps.bat
+    scripts\install_deps.ps1
+
+Note that the latter command will install ``boost`` and ``cmake`` to the ``deps`` subdirectory, while the former command
+will attempt to install the dependencies globally.
 
 Clone the Repository
 --------------------
@@ -364,9 +367,12 @@ And for Windows:
     cd build
     cmake -G "Visual Studio 16 2019 Win64" ..
 
-This latter set of instructions should result in the creation of
-**solidity.sln** in that build directory.  Double-clicking on that file
-should result in Visual Studio firing up.  We suggest building
+In case you want to use the version of boost installed by ``./scripts/install_deps.ps1``, you will
+additionally need to pass ``-DBoost_DIR="..\deps\boost\lib\cmake\Boost-*"`` and ``-DCMAKE_MSVC_RUNTIME_LIBRARY=MultiThreaded``
+as arguments to the call to ``cmake``.
+
+This should result in the creation of **solidity.sln** in that build directory.
+Double-clicking on that file should result in Visual Studio firing up.  We suggest building
 **Release** configuration, but all others work.
 
 Alternatively, you can build for Windows on the command-line, like so: