Unable to access account (second time)

My account was blocked with a message that stated it may have been possible that someone tried to access my account or that the incorrect password was entered too many times.  A rep from Microsoft sent me a link that allowed me to access the account after I filled out the information page that requires you to list numberous things about the contents of email messages.

That worked fine for a week or more, but now the account is locked again showing the same message.  Im hoping that I can get some assistance in unlocking the account again and taking the neccessary steps so that this does not happen again.  I have important medical information inside that I NEED to be able to access.