In article , Eric Stevens
wrote:

I've been running Photoshop CC for years without any trouble. I have
not used it for the last few weeks or so and in the mean time there
have been several upgrades of PS and Windows 10. For whatever reason I
now find that while PS starts OK it now always downloads files in
Camera Raw. I don't mind that but I have not been able to turn that
feature off. To compound the problem, it takes more than 2 hours to
load an image. I don't actually know how long as I give up at that
point. When I load a 30Mb NEF file the image may appear after 2 or 3
minutes but the editing sliders remain locked and unresponsive. The
Windows task manager shows that one processor core (out of 12) is
running at 100% and it will continue to do this until I shut down
Photoshop. Most times I cannot shut down Photoshop in the usual manner
but have to end the task in Task Manager. On occasion I can close
Camera Raw and then I can shutdown Photoshop normally.

something about your system is *very* broken.

under no circumstances should photoshop take 2 hours to load an image
or be unable to quit, or any app for that matter.

the first thing to try is fully uninstalling all adobe cc apps and
reinstall, although i suspect the problem is elsewhere and photoshop is
only the first app to exhibit symptoms of a much bigger problem.