From 482ad686c7f13c96c75ef1b50592b76880dfe385 Mon Sep 17 00:00:00 2001
From: Steve Dower <steve.dower@python.org>
Date: Fri, 20 Sep 2024 11:19:17 +0100
Subject: [PATCH] gh-124254: Detect freethreaded MSI component when doing an
 upgrade on Windows

---
 .../next/Windows/2024-09-20-11-18-50.gh-issue-124254.iPin-L.rst  | 1 +
 Tools/msi/bundle/bootstrap/PythonBootstrapperApplication.cpp     | 1 +
 2 files changed, 2 insertions(+)
 create mode 100644 Misc/NEWS.d/next/Windows/2024-09-20-11-18-50.gh-issue-124254.iPin-L.rst

diff --git a/Misc/NEWS.d/next/Windows/2024-09-20-11-18-50.gh-issue-124254.iPin-L.rst b/Misc/NEWS.d/next/Windows/2024-09-20-11-18-50.gh-issue-124254.iPin-L.rst
new file mode 100644
index 00000000000000..b93e356edb501d
--- /dev/null
+++ b/Misc/NEWS.d/next/Windows/2024-09-20-11-18-50.gh-issue-124254.iPin-L.rst
@@ -0,0 +1 @@
+Ensures experimental free-threaded binaries remain installed when updating.
diff --git a/Tools/msi/bundle/bootstrap/PythonBootstrapperApplication.cpp b/Tools/msi/bundle/bootstrap/PythonBootstrapperApplication.cpp
index 7cddda9b06555d..094ddba4f1ad8f 100644
--- a/Tools/msi/bundle/bootstrap/PythonBootstrapperApplication.cpp
+++ b/Tools/msi/bundle/bootstrap/PythonBootstrapperApplication.cpp
@@ -213,6 +213,7 @@ static struct { LPCWSTR regName; LPCWSTR variableName; } OPTIONAL_FEATURES[] = {
     { L"Shortcuts", L"Shortcuts" },
     // Include_launcher and AssociateFiles are handled separately and so do
     // not need to be included in this list.
+    { L"freethreaded", L"Include_freethreaded" },
     { nullptr, nullptr }
 };