Hi,
First clear your Temporary Internet Files from Internet Options> General>
Browsing History> Delete> (next screen) Delete files. Also, set the size of
the cache to 60-80 MB... Internet Options> General> Browsing History>
Settings.
- - -
Next, you may have an incompatible browser add-on.
See: http://www.enhanceie.com/ie/troubleshoot.asp
for troubleshooting information.
- - -
Or this may be a malware problem- adware, spyware, hijacker, trojan, etc.
See these sites for help:

The Parasite Fight http://www.aumha.org/a/quickfix.htm

Dealing with Unwanted Spyware and Parasites:
http://mvps.org/winhelp2002/unwanted.htm

Malware Removal and Prevention Overview - CastleCopsWiki:
http://wiki.castlecops.com/Malware_Removal_and_Prevention:_Overview

Bugs, Glitches & Stuffups: http://www.mvps.org/inetexplorer/Darnit.html

Removing Malware:
http://www.elephantboycomputers.com/page2.html#Removing_Malware

Hope this helps,
Don
[MS MVP- IE]