Can you please provide some more details as which laptop you are using, is it only the images that are unreadable or other files on the memory card are behaving in the same manner, etc.?
Also, please confirm if you can see the image files but nothing is displayed when you attempt to open them, or even the image files are not there in the memory card altogether?
If the image files are there but you cannot view the images when double-clicking them, you may want to switch the image file association to the legacy Windows Photo Viewer program. You can learn how to do so from this tutorial.