I'm having an issue where after a short period of time, my brushes start to lag in Photoshop CC. The issue started about a week after loading Photoshop CC onto a Wacom Cintiq Companion running Windows 8.1. I have read that changing from Advanced to Basic in the graphics card preferences can help. It hasn't for me. So far the only thing that has worked is uninstalling and reinstalling the program. Obviously, that gets really old. Any ideas you have are greatly appreciated. Thanks.