diff --git a/SafeExamBrowser.UserInterface.Desktop/Controls/ActionCenter/AudioControl.xaml b/SafeExamBrowser.UserInterface.Desktop/Controls/ActionCenter/AudioControl.xaml
index d81f0bf8..9a9c49a9 100644
--- a/SafeExamBrowser.UserInterface.Desktop/Controls/ActionCenter/AudioControl.xaml
+++ b/SafeExamBrowser.UserInterface.Desktop/Controls/ActionCenter/AudioControl.xaml
@@ -21,7 +21,7 @@
                     <TextBlock x:Name="AudioDeviceName" Foreground="White" Margin="5" TextAlignment="Center" />
                     <StackPanel Orientation="Horizontal" Height="40">
                         <Button x:Name="MuteButton" Background="Transparent" Foreground="White" Padding="5" Template="{StaticResource ActionCenterButton}" Width="40">
-                            <ContentControl x:Name="PopupIcon" />
+                            <ContentControl x:Name="PopupIcon" Focusable="False" />
                         </Button>
                         <Slider x:Name="Volume" Grid.Column="1" Orientation="Horizontal" TickFrequency="1" Maximum="100" IsSnapToTickEnabled="True"
                                 IsMoveToPointEnabled="True" VerticalAlignment="Center" Width="250" Thumb.DragStarted="Volume_DragStarted" Thumb.DragCompleted="Volume_DragCompleted" />
diff --git a/SafeExamBrowser.UserInterface.Desktop/Controls/Taskbar/AudioControl.xaml b/SafeExamBrowser.UserInterface.Desktop/Controls/Taskbar/AudioControl.xaml
index 229251fc..601e5f1c 100644
--- a/SafeExamBrowser.UserInterface.Desktop/Controls/Taskbar/AudioControl.xaml
+++ b/SafeExamBrowser.UserInterface.Desktop/Controls/Taskbar/AudioControl.xaml
@@ -22,7 +22,7 @@
                     <TextBlock x:Name="AudioDeviceName" Margin="5" TextAlignment="Center" />
                     <StackPanel Orientation="Horizontal" Height="40">
                         <Button x:Name="MuteButton" Background="Transparent" Padding="5" Template="{StaticResource TaskbarButton}" Width="40">
-                            <ContentControl x:Name="PopupIcon" />
+                            <ContentControl x:Name="PopupIcon" Focusable="False" />
                         </Button>
                         <Slider x:Name="Volume" Grid.Column="1" Orientation="Horizontal" TickFrequency="1" Maximum="100" IsSnapToTickEnabled="True" KeyDown="Volume_KeyDown"
                                 IsMoveToPointEnabled="True" VerticalAlignment="Center" Width="250" Thumb.DragStarted="Volume_DragStarted" Thumb.DragCompleted="Volume_DragCompleted" />
diff --git a/SafeExamBrowser.UserInterface.Mobile/Controls/ActionCenter/AudioControl.xaml b/SafeExamBrowser.UserInterface.Mobile/Controls/ActionCenter/AudioControl.xaml
index b6c38225..948348d4 100644
--- a/SafeExamBrowser.UserInterface.Mobile/Controls/ActionCenter/AudioControl.xaml
+++ b/SafeExamBrowser.UserInterface.Mobile/Controls/ActionCenter/AudioControl.xaml
@@ -21,7 +21,7 @@
                     <TextBlock x:Name="AudioDeviceName" Foreground="White" Margin="5" TextAlignment="Center" />
                     <StackPanel Orientation="Horizontal" Height="60" Margin="5,0">
                         <Button x:Name="MuteButton" Background="Transparent" Foreground="White" Padding="5" Template="{StaticResource ActionCenterButton}" Width="60">
-                            <ContentControl x:Name="PopupIcon" />
+                            <ContentControl x:Name="PopupIcon" Focusable="False" />
                         </Button>
                         <Slider x:Name="Volume" Grid.Column="1" Orientation="Horizontal" TickFrequency="1" Maximum="100" IsSnapToTickEnabled="True"
                                 IsMoveToPointEnabled="True" VerticalAlignment="Center" Width="125" Thumb.DragStarted="Volume_DragStarted" Thumb.DragCompleted="Volume_DragCompleted">
diff --git a/SafeExamBrowser.UserInterface.Mobile/Controls/Taskbar/AudioControl.xaml b/SafeExamBrowser.UserInterface.Mobile/Controls/Taskbar/AudioControl.xaml
index a17d3fe5..4fd4f2a2 100644
--- a/SafeExamBrowser.UserInterface.Mobile/Controls/Taskbar/AudioControl.xaml
+++ b/SafeExamBrowser.UserInterface.Mobile/Controls/Taskbar/AudioControl.xaml
@@ -22,7 +22,7 @@
                     <TextBlock x:Name="AudioDeviceName" Margin="5" TextAlignment="Center" />
                     <StackPanel Orientation="Horizontal" Height="60" Margin="5,0">
                         <Button x:Name="MuteButton" Background="Transparent" Padding="5" Template="{StaticResource TaskbarButton}" Width="60">
-                            <ContentControl x:Name="PopupIcon" />
+                            <ContentControl x:Name="PopupIcon" Focusable="False" />
                         </Button>
                         <Slider x:Name="Volume" Grid.Column="1" Orientation="Horizontal" TickFrequency="1" Maximum="100" IsSnapToTickEnabled="True" KeyDown="Volume_KeyDown"
                                 IsMoveToPointEnabled="True" VerticalAlignment="Center" Width="125" Thumb.DragStarted="Volume_DragStarted" Thumb.DragCompleted="Volume_DragCompleted">