title: WPF ComboBox not responding to mouse
body: <p>I have a very weird problem with a WPF ComboBox. On one computer (and only one) in our company the WPF ComboBox refuses to respond to mouse events when the ComboBox drop down is open. When the user clicks on the ComboBox to make the drop down appear and tries to select an item, he/she gets no hover effects from mouse over. When the user clicks on an item, the drop down closes, but the item they clicked never gets selected. It seems like the ComboBox's drop down of items is not responding to any mouse events. This only happens on one computer in the entire company. Everyone else's program works just fine.</p>
  
  <p>I've tried uninstalling and reinstalling the .NET Framework from 2.0 on up. I've tried disabling everything that is running in the background. I still have no luck getting it to work. I've even tried replacing the mouse. Every other program I try that has a ComboBox works fine, but the WPF one.</p>
  
  <p>Here is the code for the ComboBox:</p>
  
  <pre><code>&lt;ComboBox Grid.Column="3"
            ItemsSource="{Binding Configuration.Items}"
            SelectedItem="{Binding Configuration.CurrentItem}"
            Style="{StaticResource inputStyle}" /&gt;
  
  &lt;Style x:Key="inputStyle" TargetType="{x:Type Control}"&gt;
      &lt;Setter Property="Margin" Value="2" /&gt;
      &lt;Style.Triggers&gt;
          &lt;Trigger Property="TextBoxBasee.IsReadOnly" Value="True"&gt;
              &lt;Setter Property="Background"
                      Value="{DynamicResource {x:Static SystemColors.ControlBrushKey}}" /&gt;
          &lt;/Triggers&gt;
      &lt;/Style.Triggers&gt;
  &lt;/Style&gt;
  </code></pre>
  
  <p>Does anyone have any idea on what is happening or how to solve it?</p>