I just deinstalled Photoshop CC because once it was launched no button would do anything. So I deinstalled Photoshop restarted Windows as even after deinstallation was completed, the shortcut on the desktop was still there. Then it was not there anymore. I downloaded Photoshop from my cloud again and then restarted the system. But although it was a new installation the same error ... or no reaction. Is there a bug somewhere?
What kind of system do you have?
Photoshop is dependent on the perfect functioning of your display driver. It might not hurt to visit the web page of the maker of your video card and see if they have an updated driver for your hardware and operating system.