http://www.nirsoft.net/utils/pspv.html
If you have a password, this program will find it.
Your emails are still there.
If this doesn't work, then let us know.

Your problem is being caused by your Office installation.  Every time it
installs an update for Outlook it sets Outlook as the default mail program
rather than Outlook Express.

From http://www.fjsmjs.com/OE/defaultl.htm

Go to Start | Run and type this command, with the double quotes and spaces:

"C:\Program Files\Outlook Express\msimn.exe"  /reg

and then make sure that OE is selected as the default mail program in both
IE and OE.

If that isn't enough, see this article:
"Send To" and E-mail Links Do Not Work Using Outlook Express as Default:
http://support.microsoft.com/?kbid=306098

You might also want to try this:

Restores OE to the E-mail clients list in Internet Options
http://www.dougknox.com/xp/scripts_desc/oe_client.htm

To set Outlook as the default mail client,- Go to Start, Run - Type in the
following with quotation marks and press OK
"C:\program files\microsoft office\office\outlook.exe" /checkclient
For more information on Outlook see:
http://www.slipstick.com/config/defaultmailer.htm