Photos not importing correctly

Hey everyone, 

I have a problem that when I import photos, every single time without  fail at least one, if not more, of the photos import like this. 

They are fine on the memory card when I view on the camera and before import, then for a split second after import, but then they go like this and there is nothing I can do about it. 

Sometimes when I log back on the next day to continue editing, another of the photos that was imported the day before and were fine, will have gone like this as well. 

I have tried importing them again with no luck, I have tried new memory cards, with no luck and now I am not sure what else to try...

Can anyone please shed some light on why this is happening and how I fix it please! I am loosing good photos from client shoots because of this issue!

Thanks in advance