I'm a newcomer to this and any Forum, have read some items regarding Invalid Image problems and have same experience. I have about 100 image in JPEG and TIFF format, all in one folder, which I have used for viewing and printing with no problems. Now images cannot be opened in any programme. Their size is what I would expect for the type of images I use. Have tried loading images back onto camera via memory card but that does not work. What I have noticed is that in the properties of each file, whilst the file size is stated, there is no EXIF data. I have used Picasa 3.5 to view these in the past. Any ideas if these files can recovered please.