Excel Links to jpg images

Hi all, I have a spreadsheet where I inserted hundreds of links to jpg images saved to folders on my laptop.  The links used to work, but now when I click on them they go to a blank page in  Microsoft Explorer.  I just set up a link to a pdf file, and that link works.  I really don't want to have to re-insert hundreds of links.  Does anyone know what the issue is?  Thanks