List/Combo Box Background And Selected Colours Under .net 4.5

I have an application that's been running happily on windows 7 and below targeting the .net 4 framework.
If the application is now installed in windows 8 (Running .net 4.5 but still targeting .net 4) it shows a blue background for a selected item in a listbox or combobox and a white background for a focused item. Is there anyway to remove this?
I'm using the following in my XAML to set the style in question which seemed to resolve the issue before windows 8.

<ListBox.ItemContainerStyle>
                <Style TargetType="{x:Type ListBoxItem}">
                    <Setter Property="FocusVisualStyle" Value="{x:Null}"/>
                    <Style.Resources>
                        <SolidColorBrush x:Key="{x:Static SystemColors.HighlightBrushKey}" Color="Transparent"/>
                        <SolidColorBrush x:Key="{x:Static SystemColors.ControlBrushKey}" Color="Transparent"/>
                    </Style.Resources>
                </Style>
            </ListBox.ItemContainerStyle>