Cannot Read Jpg File Headers

I am doing data recovery for a client of mine, but I am now stuck. I managed to use Recuva to recover a lot of photos, some of which are viewable and some of which aren't. I clicked on one which I cannot open.
When I try to open it with Irfanview, it says 'Can't read file header! Unknown file format, empty file or file not found. (For Unicode file names please activate the Unicode plug-in (Properties - Languages)'. I have done that, but I stil get the same message. Is there any way I can recover the photo to (some of) its former glory?)
Properties says it is 4.12MB! (I cannot attach it as I get 'This image file was not as expected')

 

Didn't find any programs that do this for free, but here are some that can sometimes at least repair header damage. The first one seems good, but I haven't tried any of them:

http://www.techradar.com/us/news/software/recover-lost-photos-how-to-repair-corrupt-images-1117764/2

Also, found this below on a site about issues concerning a Canon Rebel camera. If you can read very closely, maybe you can make enough sense out of the steps to perform the repair yourself:

http://www.dpreview.com/forums/post/10291113

I noticed that line 6 of the instructions leaves the search term out of the quotes, but I believe the search term is "ff da". There is some linked recommended reading on the page that might help with your pics issue.

Good luck