Original title: Inbox list missing

I suddenly cannot access my Live Mail Inbox. Only single emails at a time will show up, although I can use Previous and Next buttons. Have the same problem with other folders such as Sent and Drafts. Need to access Inbox and Sent to delete incoming/outgoing emails quickly. Am on Windows 7 and using Firefox as browser. Have Kaspersky Pure 3.0 as security software. Possibly a related problem: about a week ago all my Inbox emails started duplicating as I watched. Rebooted the computer and the problem didn't reoccur, but I now have 1100+ emails to get rid of!