You can install Photoshop and other Creative Cloud apps on up to two computers. If you want to install it on a third computer, you'll need to deactivate it on one of your previous machines. Learn more about activating and deactivating Creative Cloud apps.
Adobe provides installers for only our current apps and the previous major version of each. Our older apps don’t take advantage of the latest feature, operating system, and security updates. We recommend that you explore a free trial of Creative Cloud.
You may need to update Adobe Camera Raw, the plug-in Photoshop uses to import raw image files. Check the Creative Cloud desktop app to see if an update is available. If that doesn't resolve the problem, get more troubleshooting tips to solve Photoshop camera issues.