I cannot download any attachments from my Windows Outlook e-mail Account

I have two windows outlook accounts one for work and one personal.

This morning (28 August 13) I opened my work e-mail account which contained e-mails with attachments.

When I open the e-mail, and select to download the attachement it does not download or open in any format be it word, excel or pdf.

I have tried on various pc's and it is the same problem.

I can however view the attachment online.

However, when i go into my personal outlook account attachments open without any problems on all pc's that I tested the above problem, suggesting it is an account specific problem.

Does anyone have a fix to the problem or maybe suffering the same problem?

This is very frustrating as it was all working fine when I last used my account on 26 August 2013 to view an attachment.