That is really weird. One thing you can do is...
Get into Folder Options (My Computer>Tools>Folder Options) and then click the File Types tab and then scroll down to Jpeg or whatever type of file you downloaded from your camera, select it, then click advanced and then you will be given the option to change the icon, if it doesn't look like the picture below, try and change it. It may not neccessarily have to look like the picture below, but if it's totally something different, such as your printer. You might want to mess around with it.