Take a jpeg image and do not edit it in any manner. Do not use Nikon transfer or other program. Use Window's Explorer or Mac's Finder to cut and paste the image from the camera's media card to your computer.
You can use Jeffrey\'s Exif viewer to upload your unedited Jpeg and have the EXIF data including the "Number of shutter actuations" displayed. It will be quite a long list and you will need to scroll down to find the item.
I use a card reader to copy images from a media card to the camera.