Windows 8 Visual effect can be used to turn specific visual effect on and off.  It is useful to improve the performances of Windows 8 device. If you require more virtual memory for your applications you can select Adjust for best performance otherwise you can select Let Windows choose what’s best for my computer (recommended).  

Step 1: Open  the Control Panel

 

Step 2: Select the Performance Information and Tools.

Step 2: Select the Adjust Visual Effects. Then Performance Options Window will appear. Select the Visual Effects tab.