found this


1) Conflicts with Internet Explorer
======================================
You say that you are using the latest Internet Explorer(IE). Outlook
Express also uses Internet Explorer to display HTML emails. Therefore
any image problems that affect IE will affect your HTML emails also.
The Microsoft Knowledge Base lists the following conflicts Norton
Firewall/Antivirus has with IE.
- Q309287 : Cannot View Some Images on Web Pages After Upgrade to
IE 6.0
( http://support.microsoft.com/default...;EN-US;q309287
)
***EXTRACT FROM THE ABOVE ARTICLE***

SYMPTOMS : After you upgrade to Microsoft Internet Explorer
version 6 and then browse to a Web page, some of the images on the
page may be displayed as expected, but other images may be displayed
as only a placeholder icon.
CAUSE : This behavior can occur if the Norton Personal Firewall
program is installed on your computer.
RESOLUTION : To resolve this issue, uninstall and then reinstall
the Norton Personal Firewall program. When you reinstall Norton
Personal Firewall, the program is reconfigured for Microsoft Internet
Explorer 6 and should now allow the normal display of images.
***END EXTRACT ***

While the above conflict was for IE6, the following article details a
conflict older versions of IE have with Norton Antivirus.
- MSKB Article 316545 : Web Pages Display a Red "X" Instead of a
Graphic

***EXTRACT FROM THE ABOVE ARTICLE***

SYMPTOMS : When you browse Web sites, you may find that some Web
pages display a box that shows a red "X" instead of the graphic that
you expect.
CAUSE : This behavior can occur if the following conditions are
true:
Norton AntiVirus or Norton Internet Security from Symantec Corporation
is installed on the computer. -AND-
The Nisdrv.vxd file is damaged. (This file is a component
of the Symantec programs.)
RESOLUTION : To work around this problem, use either of the
methods that are described in this section.
Method 1: Disable the Nisdrv.vxd Component
(See detailed instructions in the article)
Method 2: Remove and Reinstall the Symantec Program
***END EXTRACT ***
The best solution if you have IE conflicts, appears to be a complete
uninstallation of your Norton Products suite.
After you are finished uninstalling your Norton products,
- Reboot
- Verify that you are able to view images on webpages
- Make sure that the Internet Firewall that is built into Windows XP
is disabled. For more information, check out this article :
- Norton Internet Security or Norton Personal Firewall and Windows
XP
( http://service1.symantec.com/SUPPORT...01060513044636
)
- Reinstall your Norton product
- Everything should be hunky dory now

In case you have any problems uninstalling Norton, check out the
following Symantec KnowledgeBase articles :
- How to uninstall Norton Internet Security or Norton Personal
Firewall 2003
( service1.symantec.com/SUPPORT/nip.nsf/735050b77b1fcece88256bc7005c3bc6/bfc5401e9a00857965256c47007a4287?OpenDocument&sone =nis_2003_tasks.html
)
- How to uninstall Norton SystemWorks 2002 or 2003 manually from Win
XP
( http://service1.symantec.com/SUPPORT...01091013435207
)
- How to use the Norton SystemWorks cleanup utility (SymClean)
( http://service1.symantec.com/SUPPORT...01101612274407