Two bad answers there. AdwareAlert borders on the side of a rogue application and spywareremove.com gets a big red X from SiteAdvisor.
Download FixIEDef.exe
http://www.malwareteks.com/FixIEDef.php
to your Desktop
Double-click FixIEDef.exe
If running Vista click OK on the FixIEDef is running as Administrator popup
FixIEDef will kill all copies of Internet Explorer and Explorer that are running. The icons and Start Menu on your Desktop will not be visible while FixIEDef is running. This is necessary to remove parts of the infection that would otherwise not be removed. FixIEDef will re-start Explorer at the end of the removal process