Do you have the Google Toolbar installed? If so, does uninstalling it solve the issue?
Do you have McAffee software installed? (especially the internet security suite that includes an antiphishing component?) If so, please follow the instructions bellow:
Right click your internet explorer icon located on your desktop. Choose properties, then the advanced tab, then uncheck the box that says "enable third party browser extensions." Then open internet explorer, select tools from the menu bar, then manage add-ons.Disable Mcafee Antiphishing Filter under the "Browser Help Object" section NOT the "Browser Extension." section. Then go back and recheck the box that says "enable third party browser extensions" under the advanced tab of the Internet Explorer properties menu.
Restart internet explorer and everything should be back to normal..
if these do not work go here
if none of those work then
Please go to the malware
forum in my signature and follow the instructions at the top....Especially the CLICK HERE
That will give you several steps that will help you clean up 70 percent of all problems by yourself. If at the end of the process you are still having difficulty--and you may not be-- then post a hijackthis log in THAT
If you are still having problems after getting a clean bill of health from the malware expert, please return to this