I transferred some photos from my camera's memory disk to my hard drive and then burned them to a CD. Now I can't open some of them. Error message says "invalid image" or "format unknown/unsupported". They're all jpeg files. All the originals have been deleted from the camera's disk. I've tried the following and they still can't be opened: Windows live gallery, IrfranView, Paint, Photoshop, Picasa Photo viewer. I've also used Recuva on the the CD but those same files still yield "invalid image" when opened. What else can I try? I'd really want to save those pix.

Try copying them back to the camera storage device to see if they can be viewed in the camera first, if not then the files must have been corrupted during the copy process. I know the horse has bolted, but it would pay to check all images transferred and burned before deleting them from the camera.

Try a free program called IrfanView. I have often found that it can read bad files, which you can then re-save and they will work anywhere again. It's a good viewer anyhow. EDIT Ooops, sorry, I've only just noticed that you've tried it. some other bloke...

Thanks, anmor. I'll try that. As for what you say in par.2, yes, i have realized how important it is to do that and i've started doing it:)

It's ok, derek, thanks for trying to help too.