See if this helps.

OLEXP: Unable to Open EML File Attachments in Outlook Express:
http://support.microsoft.com/?kbid=312355

If not, when the message is highlighted, use Ctrl+F3 and see if there really
is an attachment. For many reasons, you could see a paper clip when no
attachment exists, especially if you use AVG.
--
Bruce Hagen
MS-MVP Outlook Express
~IB-CA~

"June" wrote in message
...
I'm using outlook express 6.0. When I try to open a .eml file, it only
opens
the regular outlook express application. This problem started when I had a
new computer with Windows XP Professional Version 5.1 SP 2, and only on my
computer in the office. Before I had Windows XP, I used Windows 2000 and
didn't have such problem. Actually I can open .eml file on any other
computers in the office with either Win 2000 or Win XP.

I do Windows update regularly.

I appreciate any help or comments.