If this is what your looking for, these are Taskbar Previews.
They should be already working if your using 7 Ultimate SP1. I would think your Aero Service is disabled.
Simply Right-Click in a clear space on your desktop, select Personalize from the drop down menu, Theme manager will appear. Select and activate an Aero Theme.
This should enable Aero, If it does not work then come back to us. You may need a registry fix.
Windows usually needs a subscore of 2.0 minimum to allow Aero to run, If you have a subscore of 5.0 then we know your card is capable.