title: Inno Setup generated installer does not show "Select Destination Location" page on some systems
body: <p>I create my application with <code>py2exe</code> and package it into an installer exe using Inno Setup on Windows 7. The installer created this way can then be installed on both Windows 7 and Windows 10 systems. When it works, the installer shows following screens in sequence:</p>
  
  <ol>
  <li>Welcome screen</li>
  <li>EULA screen</li>
  <li>default (or previous install) location, allowing user to select new install location, </li>
  <li>Confirming install location, and</li>
  <li>usual install screens. </li>
  </ol>
  
  <p>This is the behavior I get with <strong>Inno Setup 5.5.5</strong> or lower.</p>
  
  <p>With <strong>Inno Setup 5.5.7</strong> and higher (did not try 5.5.6), the installer is created normally and can be setup as above on Windows 7. However, the same installer fails to show screens 1 and 3 from above list during setup on Windows 10: setup directly starts with EULA screen and then jumps to confirm install location. The confirm screen doesn't even show which directory the installation will be done. </p>
  
  <p>Continuing allows the installation to happen in the default location and the application works normally. Not knowing the install location is highly annoying and undesirable.</p>
  
  <p>The <code>.iss</code> file that I use (see below) is identical across the different Inno Setup versions that I have tried. In the file, the <code>DefaultDirName</code> is set explicitly (based on the version of the application).</p>
  
  <pre><code>; WARNING: This script has been created by py2exe. Changes to this script
  ; will be overwritten the next time py2exe is run!
  
  [Setup]
  AppName=MyApp
  AppVersion=2.0.1
  AppVerName=MyApp 2.0.1
  AppPublisher=Company, Inc.
  AppPublisherURL=www.company.com
  AppContact=support@company.com
  AppCopyright=Copyright (C) 2010-2016, Company, Inc.
  LicenseFile=license\MyAppEULA.rtf
  SetupIconFile=icons\CompanyScreeningProgram.ico
  WizardImageFile=icons\MyAppImage.bmp
  WizardSmallImageFile=icons\MyAppSmallImage.bmp
  DefaultDirName=C:\MyApp_v2.0.1
  DefaultGroupName=MyApp
  Compression=lzma
  OutputDir=F:\Python\dist\
  OutputBaseFilename=MyApp_2.0.1_Setup
  
  [Files]
  Source: "MyApp_main.exe"; DestDir: "{app}\"; Flags: ignoreversion
  Source: "lib\_bsddb.pyd"; DestDir: "{app}\lib"; Flags: ignoreversion
  ;.
  ;.
  ;.  600 lines of Source:
  Source: "mpl-data\stylelib\grayscale.mplstyle"; DestDir: "{app}\mpl-data\stylelib"; Flags: ignoreversion
  </code></pre>
  
  <p>I also tried packaging the installer with Inno Setup (5.5.7 and 5.5.9) on Windows 10, but it had the same behavior. </p>
  
  <p>I was wondering it I need to set additional parameters for the installer to work correctly on Windows 10 also for newer versions of Inno Setup?</p>