Hi helpfulnerd,
There is a way of achieving what you want, but it unfortunately changes a number of other visual features.
I take it that this is what you want to disable:
To do this, click on the
Start Orb and select
Control Panel. If you are in
Category view, click on
System and Security. Next, click on
System and then
Advanced system settings (note that you will have to provide administrative credentials to continue). The option you require is
Use visual styles on windows and buttons and you need to deselect (clear) the checkbox. Finally, click on
OK and close all dialogue boxes.