Question about Outlook Express

 I bought this Windows 7 Pro workstation back in Nov 2011 and since then I have been using Windows Live mai and I am getting emails downloading according to the message in the task bar and the email received sound but they do not appear anywhere in my inbox or quickviews folder, deleted mail or junk mail where are they going? I have had several friends tell me they have emailed me but I never get their emails so I am wondering if they might be in this invisable stash someplace on my computer. hope somebody can help me, Thanks Jackie