Photoshop has crashed both my computers due to a graphic card issue. How do I
to revert to old system?
We can't know. You have not provided any exact system info or other technical details.
Previous via Cloud http://helpx.adobe.com/creative-cloud/help/install-apps.html#previous
-or OLDER previous versions http://www.adobe.com/downloads/other-downloads.html
Retrieving data ...