I also had the same problem with the same virus (HTML/Fraud.EK).
I discovered that the offending email was sent to my Gmail account, which I have set up as an IMAP account in my Outlook client.
I logged on my Gmail account via the Gmail web interface and searched the various folders for the offending email. I located it in the Gmail Spam folder. I was then able to delete the email. Problem resolved.
Hope this helps.