[Python-checkins] Updated MSI README to mention dependency on .NET 3.5. (GH-8375)

[Steve Dower]

https://github.com/python/cpython/commit/c536beedd50b0071208b4108ba9b48a36ffced79
commit: c536beedd50b0071208b4108ba9b48a36ffced79
branch: master
author: Vinay Sajip <vinay_sajip at yahoo.co.uk>
committer: Steve Dower <steve.dower at microsoft.com>
date: 2018-07-29T10:05:20+01:00
summary:

Updated MSI README to mention dependency on .NET 3.5. (GH-8375)

files:
M Tools/msi/README.txt

diff --git a/Tools/msi/README.txt b/Tools/msi/README.txt
index 1908f5c3a405..07ea9f744bd0 100644
--- a/Tools/msi/README.txt
+++ b/Tools/msi/README.txt
@@ -66,6 +66,14 @@ Before building the installer, download extra build dependencies using
 Tools\msi\get_externals.bat. (Note that this is in addition to the
 similarly named file in PCbuild.)
 
+One of the dependencies used in builds is WiX, a toolset that lets developers
+create installers for Windows Installer, the Windows installation engine. WiX
+has a dependency on the Microsoft .NET Framework Version 3.5 (which may not be
+configured on recent versions of Windows, such as Windows 10). If you are
+building on a recent Windows version, use the Control Panel (Programs | Programs
+and Features | Turn Windows Features on or off) and ensure that the entry
+".NET Framework 3.5 (includes .NET 2.0 and 3.0)" is enabled.
+
 For testing, the installer should be built with the Tools/msi/build.bat
 script: