Please see my post above for my solution for fixing the Outlook Express 6 problem that occurred to one user (of multiple users) on my Dell PC (this was after an XP SP2 update).
If the specific solution above does not work, a technician at Microsoft sent me the solutions below to try and resolve overall SP2 problems, especially Internet Explorer-related problems (one of my other users bagan having frequent IE crashes after the SP2 install):
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Regarding the Internet Explorer crash issue, we can perform the
following steps to troubleshoot this issue.
Step 1: Clear Internet Explorer settings.
===1. Click Start, click Run, input "INETCPL.CPL" (without the
quotation marks) and press Enter.
2. Click Delete cookies and Delete files on the General tab.
3. Click Clear History in the History area, and then click OK in
the dialog box that appears.
4. Click Settings, click View Objects, delete all objects there,
and then close the window.
5. Click View Files, delete all files there, and then close the
window.
6. On the Connections tab, click the LAN Settings button, and then
uncheck all the boxes.
7. On the Advanced tab, click the Restore Defaults button, and then
click to clear the checkbox beside "Enable third-party extensions".
8. Click OK to save these settings.
Step 2: Re-register some DLL files.
===1. Quit all programs that are running.
2. Click Start, and then click Run.
3. Type "cmd", and then click OK.
4. Type the following commands in this window and press the "Enter" key
after each one. On each pop up window, click "Ok".
regsvr32 urlmon.dll
regsvr32 Shdocvw.dll
regsvr32 Actxprxy.dll
regsvr32 Oleaut32.dll
regsvr32 Mshtml.dll
regsvr32 Browseui.dll
regsvr32 actxprxy.dll
regsvr32 softpub.dll
regsvr32 wintrust.dll
regsvr32 initpki.dll
regsvr32 dssenh.dll
regsvr32 jscript.dll
regsvr32 vbscript.dll
Test the issue again. If the issue still exists, please refer to the
following steps.
Step 3: Check Spyware.
===1. Go to the following link to download and install the spyware removal
tool: Ad-Aware SE
http://lavasoft.element5.com/support/download/
2. Start Ad-aware from the Start menu.
3. Under "Sections to scan," place a check mark next to My Computer.
4. Click "Check for updates now" and then click Connect to update the
software.
5. Single-click the "Scan now" button.
6. Remove all objects that are found.
If the issue continues, I suggest we uninstall Windows XP Service Pack 2
and then reinstall it.
Please refer to the following Knowledge Base article to uninstall it.
Title: How to remove Windows XP Service Pack 2 from your computer
http://support.microsoft.com/default.aspx?scid=KB;EN-US;875350
After that, I suggest we visit the following link to download and
install Windows XP Service Pack 2 in Safe Mode.
http://download.microsoft.com/download/1/6/5/165b076b-aaa9-443d-84f0-73c
f11fdcdf8/WindowsXP-KB835935-SP2-ENU.exe
Please save it to a folder that you can remember.
After downloading, please restart the computer to Safe Mode.
1. Restart the computer.
2. Keep pressing the F8 key until the Windows Startup menu appears.
3. Choose Safe Mode, and press Enter.
4. Log onto your user account and then double click the downloaded file
to install Windows XP Service Pack 2.