Hi,
It's almost certain that another program, probably malware, is causing this
problem.
Start by running BHODemon 2.0 from
http://www.definitivesolutions.com/bhodemon.htm The offender may simply be a
BHO.
Then you will want to run Ad-aware, Spybot and (if running WinXP) MS
Anti-Spyware (Beta.)
See these sites for help:
Dealing with Unwanted Spyware and Parasites:
http://mvps.org/winhelp2002/unwanted.htm
The Parasite Fight
http://www.aumha.org/a/quickfix.htm
Bugs, Glitches & Stuffups:
http://www.mvps.org/inetexplorer/Darnit.htm
What you can do about spyware and other unwanted software:
http://www.microsoft.com/athome/security/spyware/spywarewhat.mspx
You may have to post a HijackThis log to one of these forums for additional
help. Look for the proper forum and an "Important- Read This First" message
so that you follow proper procedure.
http://forum.aumha.org/viewforum.php?f=30
http://castlecops.com/forums.html
http://tomcoyote.com/forums/
http://www.bleepingcomputer.com/forums/
http://forums.spywareinfo.com/
http://www.spywarewarrior.com/index.php
http://forums.maddoktor2.com/index.php
http://forums.net-integration.net/
HijackThis Quick Start
http://www.tomcoyote.org/hjt/#Top
Or...
A legitimate program running in the background may be causing this. Disable
(for diagnostic purposes) programs such as pop-up blockers, security,
toolbars and other add-ons for IE, anti-virus, etc. Take a look at any
program that might be interfering with IE. You may have to reinstall, or not
reinstall, a program.
This (lengthy) troubleshooting process may help:
276393 - Understanding and Troubleshooting Unrecoverable Errors (Faults) in
Internet Explorer:
http://support.microsoft.com/?kbid=276393
Hope this helps,
Don
[MS MVP- IE]