Can't open a Microsoft Outlook Express message
If you have Microsoft Outlook Express configured to download headers only from a server-based account such as Hotmail, you may experience problems when trying to open a message from the Microsoft Windows Desktop Search results. In addition, you may receive a message in the Windows Desktop Search results preview pane telling you that Outlook Express isn't running.
To solve this problem, configure Outlook Express to download the entire contents of messages each time you connect to the server.
For more information, see Using server-based e-mail accounts in Outlook Express Help.