I can't get the zip to upload so it's uploading elsewhere I hope this link works...
http://www.hyperfileshare.com/d/6dea5dfa
Never mind the poor picture I'm just using it as an example.
I don't think I'm short on RAM as I did a few checks last time I was trying to solve the issue. It could be that DSS is corrupting the files.
@ Greg, this is true but it was working without any problems last year which is why I don't know whats going on.
edit to add:
This was also happening when I was trying to save a tif from a raw file in PS, the tif then would not open in registax.