Your Home Page Nevr Being Changed

Some websites illegally modify your registry editor and
 set their website as default home page, for stop this,

1. Right-click on the Internet Explorer icon on your desktop
  and select "Properties".

2. In the "Target" box you will see "C:\Program Files\Internet

Explorer\IEXPLORE.EXE".

3. Now by adding the URL of the site to the end of
   this it overrides any
Homepage setting in internet options:

"C:\Program Files\Internet Explorer\IEXPLORE.EXE" www.google.com