More information please!!!
What are you actually trying to do and how are you trying to do it?
Does the message simply appear at random, when you're not even trying to do anything with photos?
Does it appear only when you're trying to view photos. (If so, with which software?).
Does it only appear when you're trying to transfer photos from another device, such as a camera, tablet or mobile phone? (If so, how are you trying to transfers them? By connecting the device to your laptop with a cable and then using software that came with the device? By connecting the device to your laptop and then transferring them via Windows Explorer? By taking the SD card from the device, plugging it into your laptop's card reader and then using Windows Explorer?).
Have you tried simply restarting your laptop and trying again?