This type of problem is evidence of hardware failure somewhere in the system. It could be:
A bad SD card
A bad cable connecting the camera to the computer
A failing hard drive in the computer
A faulty card reader if that is what you are using
Unfortunately, it's your challenge to figure out where the weak link is and how to fix it.
Thank you for your response. It occurred on a brand new laptop so I'm thinking (hoping) not a hard drive issue. Card reader is fairly new as well. Could be SD card I guess. Would it make sense that most pictures are fine, and they are only doing this in lightroom and when I open the RAW format in Elements? Just viewing the pic on my computer, or opening the JPEG in Elements - the image is fine?!
Just viewing the picture on your computer is not showing you the raw image data if it is a raw file. It is displaying the embedded JPEG preview. If most pictures are fine then the first thing I would try is getting a new SD card. If you still encounter the same problem I would get a new card reader. How old is your camera? How long have you had the SD card that you have been using?
My camera is 6 years old, and my card is probably about the same. I have 2 other cards, so I'll try using those for a while and see if the problem occurs again. In the meantime, hopefully no more from this newborn session mess up as I continue editing Thank you for your help!