Problem accessing pictures

Hi, new to the forum and having trouble with a windows 7 laptop. We try to access pictures located in the my pictures folder, we open it in picture viewer and we get "Windows Photo Viewer can't open this picture because you don't have the correct permissions to access the file location". I get this whether it's on a USB thumb drive or photos already stored in the hard drive. I've tried changing the permissions and have had no luck, any help would be greatly appreciated.

Thanks.