Francos, could you please advise where you are uploading the image to (which object - text box, gallery, slider, etc).

Or perhaps I misread the question? Do you mean when uploading to the internet?

Does this affect all images or only one? (if only one you could perhaps attach it here??)

If you have not done so already, please restart Windows (restart, not turn off and on) before testing again.

I am uploading the image to the text box object. 

One image or all images? If large in size does a small image work? Will the image load into an image object?

Does it crash when you select the link to the image or not until you preview?

If it is PNG, please try as JPG (or vica versa)

And lastly, if you create a new page with a text object, can you reliably add an image to that?