Alright, then try disconnecting, restarting your phone, opening up a file browser app on your phone(if you have one, if not, get one from google play) and check the folder. If you find it and there are the photos, try copy and pasting it into a different folder that fully shows on the computer(and that won't affect any app). If they are not there, then try locating them by going to gallery and checking the photo's advanced info(or just "info"). The photo should have a file path.
If everything is in the camera subfolder and the above methods do not work, then try installing the phone's drivers on the computer.