Camera Raw should install with Photoshop. If you go to the Photoshop help menu and then choose about plug-ins/Camera Raw, what version of Camera Raw is indicated to be installed on your computer?
It says that 8.7 is installed.
I have no idea. Sorry. But perhaps when others see that there is activity on this thread they will be able to help you.
I have the same issue as you.
"could not complete your request because of a disk error"
I don't have any issue on Photoshop CC
but there is an error when i updated to 2014.2
(Lightroom still doing fine on Raw files)