Just to finish off BOAC's message untick the box that says
Do not allow attachments...
You will then be able to access all attachments.
The feature is a nuisance but to be fair viruses can come in many forms including ones that look like pictures but can actually be an assortment of trouble. I would ALWAYS make sure that you have an up to date AV as a huge number of viruses that people get are innocuous looking emails that may have come from a well meaning email 'friends' who send their entire address book a copy of the 'cool email they have been sent.