Looking at the Project panel in the .png you posted, GPU rendering is disabled for your current project (indicated by the greyed-out rocket icon). Try clicking on that to open the Project Settings and switch the project video renderer to use Mercury GPU Acceleration.
Don't bother. Very few things in AE are GPU accelerated in the first place and there's a million factors that could disable it. A single non-accelerated effect can do that. Outside that the usual applies: update your graphics driver and configure it suitably.