enable-win7-install-1.patch

diff --git a/Tools/msi/buildrelease.bat b/Tools/msi/buildrelease.bat
index b72eede..d5b945e 100644
--- a/Tools/msi/buildrelease.bat
+++ b/Tools/msi/buildrelease.bat
@@ -177,9 +177,7 @@ if "%OUTDIR_PLAT%" EQU "win32" (
 
 set BUILDOPTS=/p:Platform=%1 /p:BuildForRelease=true /p:DownloadUrl=%DOWNLOAD_URL% /p:DownloadUrlBase=%DOWNLOAD_URL_BASE% /p:ReleaseUri=%RELEASE_URI%
 if defined BUILDMSI (
-    %MSBUILD% "%D%bundle\releaselocal.wixproj" /t:Rebuild %BUILDOPTS% %CERTOPTS% /p:RebuildAll=true
-    if errorlevel 1 exit /B
-    %MSBUILD% "%D%bundle\releaseweb.wixproj" /t:Rebuild %BUILDOPTS% %CERTOPTS% /p:RebuildAll=false
+    %MSBUILD% "%D%bundle\full.wixproj" /t:Rebuild %BUILDOPTS% %CERTOPTS% /p:RebuildAll=true
     if errorlevel 1 exit /B
 )
 
diff --git a/Tools/msi/bundle/Default.wxl b/Tools/msi/bundle/Default.wxl
index 791ce6e..0e63929 100644
--- a/Tools/msi/bundle/Default.wxl
+++ b/Tools/msi/bundle/Default.wxl
@@ -88,8 +88,8 @@ Select Customize to review current options.</String>
   <String Id="InstallLauncherAllUsersLabel">for &amp;all users (requires elevation)</String>
   <String Id="ShortInstallLauncherAllUsersLabel">Install &amp;launcher for all users (recommended)</String>
   <String Id="PrecompileLabel">&amp;Precompile standard library</String>
-  <String Id="Include_symbolsLabel">Download debugging &amp;symbols</String>
-  <String Id="Include_debugLabel">Download debu&amp;g binaries (requires VS 2017 or later)</String>
+  <String Id="Include_symbolsLabel">Install debugging &amp;symbols</String>
+  <String Id="Include_debugLabel">Install debu&amp;g binaries (requires VS 2017 or later)</String>
   
   <String Id="ProgressHeader">[ActionLikeInstallation] Progress</String>
   <String Id="ProgressLabel">[ActionLikeInstalling]:</String>
@@ -121,9 +121,17 @@ Feel free to email &lt;a href="mailto:python-list@python.org"&gt;python-list@pyt
   <String Id="FailureRestartButton">&amp;Restart</String>
   <String Id="FailureExistingInstall">Unable to install [WixBundleName] due to an existing install. Use Programs and Features to modify, repair or remove [WixBundleName].</String>
   
-  <String Id="FailureOldOS">At least Windows 8.1 or Windows Server 2012 are required to install [WixBundleName]
+  <String Id="FailureWin7MissingSP1">Windows 7 Service Pack 1 and all applicable updates are required to install [WixBundleName].
+
+Please &lt;a href="https://www.bing.com/search?q=how%20to%20install%20windows%207%20service%20pack%201"&gt;update your machine&lt;/a&gt; and then restart the installation.</String>
+  <String Id="FailureVistaOrEarlier">Windows 7 SP1 or later is required to install and use [WixBundleName].
+
+Visit &lt;a href="https://www.python.org/"&gt;python.org&lt;/a&gt; to download Python 3.8.</String>
+
+  <String Id="FailureWS2K8R2MissingSP1">Windows Server 2008 R2 Service Pack 1 and all applicable updates are required to install [WixBundleName].
+
+Please &lt;a href="https://www.bing.com/search?q=how%20to%20install%20windows%20server%202008%20r2%20service%20pack%201"&gt;update your machine&lt;/a&gt; and then restart the installation.</String>
 
-Visit &lt;a href="https://www.python.org/"&gt;python.org&lt;/a&gt; to download an earlier version of Python.</String>
   <String Id="SuccessMaxPathButton">Disable path length limit</String>
   <String Id="SuccessMaxPathButtonNote">Changes your machine configuration to allow programs, including Python, to bypass the 260 character "MAX_PATH" limitation.</String>
 </WixLocalization>
diff --git a/Tools/msi/bundle/bootstrap/PythonBootstrapperApplication.cpp b/Tools/msi/bundle/bootstrap/PythonBootstrapperApplication.cpp
index 3c54e40..4532389 100644
--- a/Tools/msi/bundle/bootstrap/PythonBootstrapperApplication.cpp
+++ b/Tools/msi/bundle/bootstrap/PythonBootstrapperApplication.cpp
@@ -3011,35 +3011,55 @@ private:
                 BalLog(BOOTSTRAPPER_LOG_LEVEL_STANDARD, "Target OS is Windows Server 2012 or later");
                 return;
             } else if (IsWindowsVersionOrGreater(6, 1, 1)) {
-                BalLog(BOOTSTRAPPER_LOG_LEVEL_STANDARD, "Detected Windows Server 2008 R2");
+                HMODULE hKernel32 = GetModuleHandleW(L"kernel32");
+                if (hKernel32 && !GetProcAddress(hKernel32, "AddDllDirectory")) {
+                    BalLog(BOOTSTRAPPER_LOG_LEVEL_ERROR, "Detected Windows Server 2008 R2 without KB2533623");
+                    BalLog(BOOTSTRAPPER_LOG_LEVEL_ERROR, "KB2533623 update is required to continue.");
+                    /* The "MissingSP1" error also specifies updates are required */
+                    LocGetString(_wixLoc, L"#(loc.FailureWS2K8R2MissingSP1)", &pLocString);
+                } else {
+                    BalLog(BOOTSTRAPPER_LOG_LEVEL_STANDARD, "Target OS is Windows Server 2008 R2 or later");
+                    return;
+                }
             } else if (IsWindowsVersionOrGreater(6, 1, 0)) {
                 BalLog(BOOTSTRAPPER_LOG_LEVEL_ERROR, "Detected Windows Server 2008 R2");
+                BalLog(BOOTSTRAPPER_LOG_LEVEL_ERROR, "Service Pack 1 is required to continue installation");
+                LocGetString(_wixLoc, L"#(loc.FailureWS2K8R2MissingSP1)", &pLocString);
             } else if (IsWindowsVersionOrGreater(6, 0, 0)) {
                 BalLog(BOOTSTRAPPER_LOG_LEVEL_ERROR, "Detected Windows Server 2008");
+                BalLog(BOOTSTRAPPER_LOG_LEVEL_ERROR, "Windows Server 2008 SP2 or later is required to continue installation");
+                LocGetString(_wixLoc, L"#(loc.FailureWS2K8R2MissingSP1)", &pLocString);
             } else {
                 BalLog(BOOTSTRAPPER_LOG_LEVEL_ERROR, "Detected Windows Server 2003 or earlier");
+                BalLog(BOOTSTRAPPER_LOG_LEVEL_ERROR, "Windows Server 2008 SP2 or later is required to continue installation");
+                LocGetString(_wixLoc, L"#(loc.FailureWS2K8R2MissingSP1)", &pLocString);
             }
-            BalLog(BOOTSTRAPPER_LOG_LEVEL_ERROR, "Windows Server 2012 or later is required to continue installation");
         } else {
-            if (IsWindows10OrGreater()) {
-                BalLog(BOOTSTRAPPER_LOG_LEVEL_STANDARD, "Target OS is Windows 10 or later");
-                return;
-            } else if (IsWindows8Point1OrGreater()) {
-                BalLog(BOOTSTRAPPER_LOG_LEVEL_STANDARD, "Target OS is Windows 8.1");
+            if (IsWindows8OrGreater()) {
+                BalLog(BOOTSTRAPPER_LOG_LEVEL_STANDARD, "Target OS is Windows 8 or later");
                 return;
-            } else if (IsWindows8OrGreater()) {
-                BalLog(BOOTSTRAPPER_LOG_LEVEL_ERROR, "Detected Windows 8");
+            } else if (IsWindows7SP1OrGreater()) {
+                HMODULE hKernel32 = GetModuleHandleW(L"kernel32");
+                if (hKernel32 && !GetProcAddress(hKernel32, "AddDllDirectory")) {
+                    BalLog(BOOTSTRAPPER_LOG_LEVEL_ERROR, "Detected Windows 7 SP1 without KB2533623");
+                    BalLog(BOOTSTRAPPER_LOG_LEVEL_ERROR, "KB2533623 update is required to continue.");
+                    /* The "MissingSP1" error also specifies updates are required */
+                    LocGetString(_wixLoc, L"#(loc.FailureWin7MissingSP1)", &pLocString);
+                } else {
+                    BalLog(BOOTSTRAPPER_LOG_LEVEL_STANDARD, "Target OS is Windows 7 SP1 or later");
+                    return;
+                }
             } else if (IsWindows7OrGreater()) {
-                BalLog(BOOTSTRAPPER_LOG_LEVEL_ERROR, "Detected Windows 7");
-            } else if (IsWindowsVistaOrGreater()) {
-                BalLog(BOOTSTRAPPER_LOG_LEVEL_ERROR, "Detected Windows Vista");
+                BalLog(BOOTSTRAPPER_LOG_LEVEL_ERROR, "Detected Windows 7 RTM");
+                BalLog(BOOTSTRAPPER_LOG_LEVEL_ERROR, "Service Pack 1 is required to continue installation");
+                LocGetString(_wixLoc, L"#(loc.FailureWin7MissingSP1)", &pLocString);
             } else { 
-                BalLog(BOOTSTRAPPER_LOG_LEVEL_ERROR, "Detected Windows XP or earlier");
+                BalLog(BOOTSTRAPPER_LOG_LEVEL_ERROR, "Detected Vista or earlier");
+                BalLog(BOOTSTRAPPER_LOG_LEVEL_ERROR, "Windows 7 SP1 or later is required to continue installation");
+                LocGetString(_wixLoc, L"#(loc.FailureVistaOrEarlier)", &pLocString);
             }
-            BalLog(BOOTSTRAPPER_LOG_LEVEL_ERROR, "Windows 8.1 or later is required to continue installation");
         }
 
-        LocGetString(_wixLoc, L"#(loc.FailureOldOS)", &pLocString);
         if (pLocString && pLocString->wzText) {
             BalFormatString(pLocString->wzText, &_failedMessage);
         }
diff --git a/Tools/msi/bundle/packagegroups/crt.wxs b/Tools/msi/bundle/packagegroups/crt.wxs
index f931da1..bcb81ea 100644
--- a/Tools/msi/bundle/packagegroups/crt.wxs
+++ b/Tools/msi/bundle/packagegroups/crt.wxs
@@ -4,7 +4,7 @@
         <PackageGroup Id="crt">
             <MsiPackage Id="ucrt_AllUsers"
                         SourceFile="ucrt.msi"
-                        Compressed="no"
+                        Compressed="yes"
                         DownloadUrl="$(var.DownloadUrl)"
                         ForcePerMachine="yes"
                         InstallCondition="InstallAllUsers and not CRTInstalled and (Include_core or Include_exe or Include_pip) and not LauncherOnly">
@@ -12,7 +12,7 @@
             </MsiPackage>
             <MsiPackage Id="ucrt_JustForMe"
                         SourceFile="ucrt.msi"
-                        Compressed="no"
+                        Compressed="yes"
                         DownloadUrl="$(var.DownloadUrl)"
                         ForcePerMachine="no"
                         InstallCondition="not InstallAllUsers and not CRTInstalled and (Include_core or Include_exe or Include_pip) and not LauncherOnly">