Maybe you have been hijacked .
------------------------------------------------------
IE6 Homepage Rewrite
-----------------------------------------------------------
Unable to access Internet Explorer > Tools > Internet Options .
Within Spybot S&D , the "Immunize" section has 2 check boxes blocking any changes to IE home page , as some spyware tries to do .
Uncheck the boxes .
Go to Control Panel & use Internet Options .
Or , use this program & untick , Tools > Internet Options menu .
IE Restrictions
-----------------------------------------------------------
Have you had problems with sites hijacking your Home Page or other Internet Explorer restrictions? IE Restrictions will remove most common restrictions that may have been set by a sleaze web site as well as other methods. I do not
guarantee this will remove all types available as there are just too many to put in one program but this will take care of 24 of the most common ones. Of course you can also use it to set any restrictions you'd like to have on your PC.
-------------------------------------------------------------
Browser Hijack Blaster
Browser Hijack Blaster protects your system from browser hijackers and spyware that alters your Internet Explorer settings.
Running silently in the background, Browser Hijack Blaster only springs into action when an attempt is made. It watches and protects the following items:
IE Homepage, IE Default Page, IE Search Page, BHOs
Whenver one of the above items is changed, or a BHO is added, you are immediately provided with information on the item, along with the option to keep the change, or revert to your previous settings.
Browser Hijack Blaster also can detect changes between the times it is run. If a spyware application tries to install its BHO at boot-up, and change settings at boot-up, before Browser Hijack Blaster is activated, you will be notified and (like the situation above) given the option to keep the change or to revert to your previous settings.
Browser Hijack Blaster also has a database of values common to spyware programs. If, for example, your homepage is changed to lop.com (a known hijacker) you will not only be notified, but a special notice will be displayed that you probably have Lop.com on your system (and that you should run an anti-spyware program such as Ad-Aware or Spybot S & D).
Download Browser Hijack Blaster from here. (Installer is approx. 394 kb.)
Compatible with Windows 95, 98, ME, NT 4, 2000, XP.