Printing from Internet Explorer or Outlook Express messages is printed an the html source code instead of the webpage or email.
This problem is due to the association, a program for opening tmp files to a text editor (eg notepad).

So to solve the problem described this association should be eliminated through the following steps:

• Open the Windows Explorer
• From the menu, otherwise select "Tools - Folder Options - File Types"
• Click on the Delete button to remove for tmp extension the program opening association.

Updates: Internet Explorer 8 has not the problem above.