Have downloaded some photo's from camera to photo's on Windows 11, now wish to transfer some to desktop. In the past it was an easy drag and drop, now when I click on any image an icon appears in the middle of the image. The icon is a circle with a diagonal slash, similar to the national speed limit sign. Now whilst I can drag the image it fails to drop on to desktop. Any ideas as to what has happened, my pc is behaving oddly at the moment in other areas and seems slower than normal.