How do I open an unsupported Tiff?

[Artifex1975]

Hello there,
I have a folder of tiffs that were recovered from an sd card out of a Canon T3i. The only recovery software that worked saved them as Tiff files. I can view the thumbnail, I can even view the full res version in Windows Picture Viewer, but the files cannot be opened by Lightroom, Photoshop, Infranview or Gimp. The all spit out a message to the tune of "unsupported tiff format".
I'd be happy to just get these things into jpeg format so that I can edit them, this mess is turning into a nightmare. Please, please give me some wisdom. I'm at a loss.

 

[colleague]

open in windows picture viewer and with ctrl +S you can save as jpg

 

[ibis]

for the recovery, try to use Get Data's RecovermyFiles, it is not free but if it is a great program.
alternatively there is Recuva.
very often recovery programs can recover just a pieces of files that makes them unable to be opened,
so far i used irfanview armed with it's plugins pack to open this kind of files than you may crop out
damaged areas.