Unable to import images?

[Grandpappy]

Suddenly I am unable to import some images into my emails. I get a small box with what looks like a sheet of paper that has been torn in half with a corner folded over. The images were in an emails sent by a friend of some creatures left behind after the tsunami and I can't view any of them. I'm using Thunderbird and Windows 7.
What's gone wrong?
Any help,please?
Cheers

[AlBags]

Assuming Thunderbird is set up correctly (or OK before) the images have been damaged in transit .. or have been removed.
You could ask him/her to zip up and attach the zip .. making sure max size of email is lower than 10Mb.