Paintstormstudio.com

Hello, Im having an issue with some brushes and when brush size is larger where instead of seeing the brush or eraser strokes, black boxes show instead. I saw in a previous post that you suggested to update the graphic card? How do you go about that and is that the only way to fix the issue?

Check how it works without GPU (Menu-options-OpenGL-Gpu acceleration)
But anyway the only one thing you can do is to re-install graphics card drivers.