From 13380e429d975630d6ae2ee8c50d3456e0775dad Mon Sep 17 00:00:00 2001
From: overdrive1708 <52090022+overdrive1708@users.noreply.github.com>
Date: Sun, 8 Nov 2026 11:46:57 +0900
Subject: [PATCH 1/4] Change logic.

---
 src/WindowsDeviceManagerAgent/WindowsDeviceInfoCollector.cs | 1 +
 src/WindowsDeviceManagerViewer/Utilities/DatabaseWriter.cs  | 1 +
 2 files changed, 2 insertions(+)

diff --git a/src/WindowsDeviceManagerAgent/WindowsDeviceInfoCollector.cs b/src/WindowsDeviceManagerAgent/WindowsDeviceInfoCollector.cs
index 0bc5c6a..151c144 100644
--- a/src/WindowsDeviceManagerAgent/WindowsDeviceInfoCollector.cs
+++ b/src/WindowsDeviceManagerAgent/WindowsDeviceInfoCollector.cs
@@ -213,6 +213,7 @@ private static string GetOSVersion()
                         "22631" => "23H2",
                         "26100" => "24H2",
                         "26200" => "25H2",
+                        "28000" => "26H1",
                         _ => $"{Resources.Strings.Unknown}(OS Build:{osBuildNumber})"
                     };
                 }
diff --git a/src/WindowsDeviceManagerViewer/Utilities/DatabaseWriter.cs b/src/WindowsDeviceManagerViewer/Utilities/DatabaseWriter.cs
index 4ac2767..8b5f940 100644
--- a/src/WindowsDeviceManagerViewer/Utilities/DatabaseWriter.cs
+++ b/src/WindowsDeviceManagerViewer/Utilities/DatabaseWriter.cs
@@ -180,6 +180,7 @@ private static string GetOSVersion(string osName, string osBuildNumber)
                     "22631" => "23H2",
                     "26100" => "24H2",
                     "26200" => "25H2",
+                    "28000" => "26H1",
                     _ => $"{Resources.Strings.Unknown}(OS Build:{osBuildNumber})"
                 };
             }

From c4bb73a96f0240a02630dad288192cbb6b3e9f68 Mon Sep 17 00:00:00 2001
From: overdrive1708 <52090022+overdrive1708@users.noreply.github.com>
Date: Sun, 8 Nov 2026 11:47:00 +0900
Subject: [PATCH 2/4] Update CHANGELOG.md

---
 CHANGELOG.md | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0c445d6..a692fe8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+- Support Windows11 26H1.
+
 ### Changed
 
 - Upgrade .NET8 to .NET10.

From abb3b2c40b0133e57786eb00abe68819caa97f17 Mon Sep 17 00:00:00 2001
From: overdrive1708 <52090022+overdrive1708@users.noreply.github.com>
Date: Sun, 8 Nov 2026 11:47:02 +0900
Subject: [PATCH 3/4] Update README-en.md

---
 README-en.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/README-en.md b/README-en.md
index c159f9f..15e2b5a 100644
--- a/README-en.md
+++ b/README-en.md
@@ -165,6 +165,7 @@ A screen for selecting a database file will open, so specify the database file (
   - Version 23H2
   - Version 24H2
   - Version 25H2
+  - Version 26H1
 
 ## Restrictions
 - When logged in via remote desktop, the user name cannot be obtained and is recorded as "Unknown".

From 96fdafa45b28b21ba8434862c8b0e78323580b93 Mon Sep 17 00:00:00 2001
From: overdrive1708 <52090022+overdrive1708@users.noreply.github.com>
Date: Sun, 8 Nov 2026 11:47:04 +0900
Subject: [PATCH 4/4] Update README.md

---
 README.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/README.md b/README.md
index cc338c3..5873dac 100644
--- a/README.md
+++ b/README.md
@@ -165,6 +165,7 @@ WindowsDeviceManagerViewerフォルダ内のWindowsDeviceManagerViewer.exeを起
   - Version 23H2
   - Version 24H2
   - Version 25H2
+  - Version 26H1
 
 ## 制限事項
 - リモートデスクトップでログインしている時は､ユーザ名が取得できないため､｢不明｣と記録されます｡