diff --git a/.github/workflows/flutter-build.yml b/.github/workflows/flutter-build.yml
index 522585b5f..0a3f7a9c3 100644
--- a/.github/workflows/flutter-build.yml
+++ b/.github/workflows/flutter-build.yml
@@ -35,8 +35,19 @@ env:
   UPLOAD_ARTIFACT: "${{ inputs.upload-artifact }}"
 
 jobs:
+  build-RustDeskTempTopMostWindow:
+    uses: ./.github/workflows/third-party-RustDeskTempTopMostWindow.yml
+    with:
+      target: windows-2019
+      configuration: Release
+      platform: x64
+      target_version: Windows10
+    strategy:
+        fail-fast: false
+
   build-for-windows-flutter:
     name: ${{ matrix.job.target }} (${{ matrix.job.os }})
+    needs: [build-RustDeskTempTopMostWindow]
     runs-on: ${{ matrix.job.os }}
     strategy:
       fail-fast: false
@@ -125,6 +136,12 @@ jobs:
             ls -l ./libs/portable/Runner.res;
           fi
 
+      - name: Download RustDeskTempTopMostWindow artifacts
+        uses: actions/download-artifact@master
+        with:
+          name: topmostwindow-artifacts
+          path: './flutter/build/windows/x64/runner/Release/'
+
       - name: Sign rustdesk files
         uses: GermanBluefox/code-sign-action@v7
         if: false # env.UPLOAD_ARTIFACT == 'true'
diff --git a/.github/workflows/third-party-RustDeskTempTopMostWindow.yml b/.github/workflows/third-party-RustDeskTempTopMostWindow.yml
new file mode 100644
index 000000000..c43410ef3
--- /dev/null
+++ b/.github/workflows/third-party-RustDeskTempTopMostWindow.yml
@@ -0,0 +1,56 @@
+name: build RustDeskTempTopMostWindow
+
+on:
+  workflow_call:
+    inputs:
+        target:
+            description: 'Target'
+            required: true
+            type: string
+            default: 'windows-2019'
+        configuration:
+            description: 'Configuration'
+            required: true
+            type: string
+            default: 'Release'
+        platform:
+            description: 'Platform'
+            required: true
+            type: string
+            default: 'x64'
+        target_version:
+            description: 'TargetVersion'
+            required: true
+            type: string
+            default: 'Windows10'
+
+env:
+  project_path: WindowInjection/WindowInjection.vcxproj
+
+jobs:
+  build-RustDeskTempTopMostWindow:
+    runs-on: ${{ inputs.target }}
+    strategy:
+        fail-fast: false
+    env:
+      build_output_dir: RustDeskTempTopMostWindow/WindowInjection/${{ inputs.platform }}/${{ inputs.configuration }}
+    steps:
+      - name: Add MSBuild to PATH
+        uses: microsoft/setup-msbuild@v2
+
+      - name: Download the source code
+        run: |
+          git clone https://github.com/rustdesk-org/RustDeskTempTopMostWindow RustDeskTempTopMostWindow
+
+        # Build. commit 53b548a5398624f7149a382000397993542ad796 is tag v0.3
+      - name: Build the project
+        run: |
+          cd RustDeskTempTopMostWindow && git checkout 53b548a5398624f7149a382000397993542ad796
+          msbuild ${{ env.project_path }} -p:Configuration=${{ inputs.configuration }} -p:Platform=${{ inputs.platform }} /p:TargetVersion=${{ inputs.target_version }}
+
+      - name: Archive build artifacts
+        uses: actions/upload-artifact@master
+        with:
+            name: topmostwindow-artifacts
+            path: |
+              ./${{ env.build_output_dir }}/WindowInjection.dll
diff --git a/build.py b/build.py
index 75124e33f..189365314 100755
--- a/build.py
+++ b/build.py
@@ -80,8 +80,10 @@ def parse_rc_features(feature):
         return get_all_features()
     elif isinstance(feature, list):
         if windows:
+            # download third party is deprecated, we use github ci instead.
             # force add PrivacyMode
-            feature.append('PrivacyMode')
+            # feature.append('PrivacyMode')
+            pass
         for feat in feature:
             if isinstance(feat, str) and feat.upper() == 'ALL':
                 return get_all_features()
@@ -194,6 +196,9 @@ def generate_build_script_for_docker():
     system2("bash /tmp/build.sh")
 
 
+# Downloading third party resources is deprecated.
+# We can use this function in an offline build environment.
+# Even in an online environment, we recommend building third-party resources yourself.
 def download_extract_features(features, res_dir):
     import re