Pictures not showing in Word 2013, no problem with same file in word 2010

I have a large word file with numerous pictures inserted as TIFF files. In Word 2010, the pictures are all visible on screen and when I print them. However, when opening the same file (saved as docx or doc - I've tried both) in Word 2013 not all pictures are visible and they don't convert to pdf or print out either. It varies between which ones are and which aren't so I don't think its a problem with the pictures themselves. The pictures come up as either blank white boxes or with a little red cross and the statement 'error picture cannot be displayed'.

All files are less than half a page and therefore shouldn't be affected by the error involving multipage TIFF files that I've seen mentioned.

I've formatted them as 'tight', however I've tried the other options and this doesn't appear to change anything. 

I've also been through the advanced settings options and deselected 'show pictures as placeholders'.

I'm not sure what else to do - I've tried playing around with all sorts including changing privacy options within the trust center. Any advice would be very much appreciated - I wish I'd just stuck with Word 2010!

Many thanks

Hannah