I run CS6 (64-bit) on a PC (not the CC version). It's run perfectly the past year. Last week, out of the blue, a problem began. When I click on the adjust contrast pull-down, the eyedropper pops up in the middle of the screen and the program freezes. I have to go to Task Manager and shut the program down to unfreeze it, in the process losing anything I've been working on. I've done a virus scan: no problems. It appears I have a corrupted file, but which one? Do I need to reinstall CS6 ?
Sorry to hear that.
You could try to see if resetting Photoshop's preferences to defaults might help first... Press and hold Control - Shift - Alt simultaneously immediately upon cold-starting Photoshop. If you get the keys down quickly enough - and you have to be really quick - it will prompt you to confirm deletion of your current preferences, which will lead to the establishment of a fresh default set. If it does not prompt you, you haven't been quick enough to get the keys down.