diff --git a/README.md b/README.md
index dd31e4ed..48ff5f05 100644
--- a/README.md
+++ b/README.md
@@ -384,8 +384,16 @@ process.
 Download and install the following software:
 
 - [Python 2 or Python 3][python-win-download]. Be sure to pick the version
-corresponding to your Vim architecture. It is _Windows x86_ for a 32-bit Vim and
-_Windows x86-64_ for a 64-bit Vim. We recommend installing Python 3.
+  corresponding to your Vim architecture. It is _Windows x86_ for a 32-bit Vim 
+  and _Windows x86-64_ for a 64-bit Vim. We recommend installing Python 3. 
+  Additionally, the version of Python you install must match up exactly with 
+  the version of Python that Vim is looking for. Type `:version` and look at the
+  bottom of the page at the list of compiler flags. Look for flags that look 
+  similar to `-DDYNAMIC_PYTHON_DLL=\"python27.dll\"` and 
+  `-DDYNAMIC_PYTHON3_DLL=\"python35.dll\"`. The former indicates that Vim is 
+  looking for Python 2.7 and the latter indicates that Vim is looking for 
+  Python 3.5. You'll need one or the other installed, matching the version 
+  number exactly.
 - [CMake][cmake-download]. Add CMake executable to the PATH environment
 variable.
 - [Visual Studio][visual-studio-download]. Download the community edition.