I can't work on any image because for some reason everything I pull up shows a message that it is locked. I did not lock it, at least not knowingly. How can I restore things to normal? I can't ev en move it around on the desktop.
It would be hopeful to know where and in what software you are seeing this lock. And what OS are you running and what version of the software?
A lock might mean that the files are readonly and cannot be modified, either because they are on readonly media like a CD or DVD or because the user the program is operating under doesn't have permission to modify the files.
Thank you Steve, that is very sensible. I am using a new iMac, OS X Yosemite, version 10.10.3., and Photoshop CC. I have been using Photoshop normally for several days, and only yesterday did I encounter this problem. I apparently did something to effect a total lockdown. I first met the problem when I tried to Import an image from an external hard drive, and I assumed at first that it was limited to the external drive. But I can't get images that are in my computer either.