The symptoms been bothering me for months now. At times they seem to disappear for days then randomly come back later:
-Brush strokes don't register every few seconds.
-Selecting and transforming take multiple tries.
-Basically every tool and command take multiple tries for them to execute.
-Once I close and reopen the program I can't open any files.
-Restarting the system fixes it until it happens again in minutes or hours.
So far I've tried:
-Disabling graphic acceleration
-Switching to onboard graphic for graphic acceleration
-Changing memory allocation, scratch disk.
-Switching to another set of ram sticks.
-Rolling back to multiple older versions of graphic driver
-Multiple versions of photoshop cc, photoshop 6
intel i5 2500k, 8gb ram, windows 7 64bit, geforce 560ti, intel HD 3000
Instead of turning off Graphic Processor Settings, keep it on and change it to "Basic" under Advanced Settings.
Also, turn Brush Smoothing to 0 and any advance Technology Preview settings.
But if this happening with other versions of PS, there might be something wrong with your computer.