diff --git a/src/PSLauncher.App/Views/MainWindow.xaml b/src/PSLauncher.App/Views/MainWindow.xaml
index a8d1190..d4da573 100644
--- a/src/PSLauncher.App/Views/MainWindow.xaml
+++ b/src/PSLauncher.App/Views/MainWindow.xaml
@@ -290,8 +290,9 @@
             </Grid>
         </Border>
 
-        <!-- Body -->
-        <ScrollViewer Grid.Row="1" VerticalScrollBarVisibility="Auto">
+        <!-- Body : Grid pour pouvoir superposer le bouton flottant "Vérifier les MAJ" -->
+        <Grid Grid.Row="1">
+            <ScrollViewer VerticalScrollBarVisibility="Auto">
             <StackPanel Margin="32,28">
 
                 <!-- ========= FEATURED (version courante) ========= -->
@@ -484,36 +485,29 @@
                 </Border>
 
             </StackPanel>
-        </ScrollViewer>
+            </ScrollViewer>
 
-        <!-- Footer : toujours visible.
-             Ligne 1 : bouton "Vérifier les MAJ" à gauche (toujours présent)
-             Ligne 2 : statut + progress bar (visible quand busy / status non vide) -->
+            <!-- Bouton flottant "Vérifier les MAJ" : ancré bas-gauche du body, au-dessus
+                 du background bitmap, à l'extérieur du footer. -->
+            <Button HorizontalAlignment="Left" VerticalAlignment="Bottom"
+                    Margin="32,0,0,24"
+                    Style="{StaticResource SecondaryButton}"
+                    Content="🔄  Vérifier les MAJ"
+                    Command="{Binding CheckForUpdatesCommand}" />
+        </Grid>
+
+        <!-- Footer : visible uniquement quand busy / status à afficher.
+             Le bouton "Vérifier les MAJ" a été déplacé en flottant au-dessus du body. -->
         <Border Grid.Row="2" Background="{StaticResource Brush.Bg.Footer}"
                 BorderBrush="{StaticResource Brush.Border}" BorderThickness="0,1,0,0"
-                Padding="20,10">
-            <StackPanel>
-                <!-- Ligne 1 : actions permanentes -->
-                <Grid>
-                    <Grid.ColumnDefinitions>
-                        <ColumnDefinition Width="Auto" />
-                        <ColumnDefinition Width="*" />
-                        <ColumnDefinition Width="Auto" />
-                    </Grid.ColumnDefinitions>
-                    <Button Grid.Column="0"
-                            Style="{StaticResource SecondaryButton}"
-                            Content="🔄  Vérifier les MAJ"
-                            Command="{Binding CheckForUpdatesCommand}" />
-                    <Button Grid.Column="2"
-                            Style="{StaticResource SecondaryButton}"
-                            Content="Annuler"
-                            Command="{Binding CancelDownloadCommand}"
-                            Visibility="{Binding IsBusy, Converter={StaticResource BoolToVisibility}}" />
-                </Grid>
-
-                <!-- Ligne 2 : statut + progression (visible si busy ou message) -->
-                <StackPanel Margin="0,8,0,0"
-                            Visibility="{Binding FooterVisibility}">
+                Padding="20,10"
+                Visibility="{Binding FooterVisibility}">
+            <Grid>
+                <Grid.ColumnDefinitions>
+                    <ColumnDefinition Width="*" />
+                    <ColumnDefinition Width="Auto" />
+                </Grid.ColumnDefinitions>
+                <StackPanel Grid.Column="0">
                     <TextBlock Text="{Binding FooterText}"
                                Foreground="{StaticResource Brush.Text.Secondary}"
                                FontSize="12" />
@@ -522,7 +516,13 @@
                                  Foreground="{StaticResource Brush.Accent}"
                                  Background="#2A2A30" BorderThickness="0" />
                 </StackPanel>
-            </StackPanel>
+                <Button Grid.Column="1"
+                        Style="{StaticResource SecondaryButton}"
+                        Content="Annuler"
+                        VerticalAlignment="Center" Margin="12,0,0,0"
+                        Command="{Binding CancelDownloadCommand}"
+                        Visibility="{Binding IsBusy, Converter={StaticResource BoolToVisibility}}" />
+            </Grid>
         </Border>
     </Grid>
 </Window>