Changed the default location of the stored messages.
Created a folder called Outlook Express. C:\Documents and Settings\My Name\Local Settings\Application Data\Outlook Express
Click the following in Outlook Express: Tools > Options > Maintenance Locate this: Click here to change the location of your message store. Click on "Store Folder..." Click "Change" Navigate to the folder you created and hi-light it. Click "OK" Click "OK" Reboot.
It will rebuild your message store to the chosen one upon restarting Outlook Express.