I am continually having to rest my preferences to keep it running otherwise I get freezes and things like losing the white circle from previous uses of adjustment brushes or clone stamp and other things harder to explain like brushes continuing to paint after I release the mouse button or the sliders doing absolutely nothing after defining an area with the AB. The only thing that seems to fix this is resetting preferences but boy is that getting to be a huge pain. On a complicated image I will have to reset prefs at least twice and many more sometimes. This is on a W7 machine with 24 GB of ram. I have updated the driver for the graphics card directly from manufacturer, cleared catches etc. but I do get less problems when I turn the GPU off. I'm thinking I need to wipe everything and do a clean install, but don't have the time clear to do it right now-takes me about two days.
