HTC Mogul / XV6800 / PPC6800 / P4000

Hey does ANYONE know the home link to the home page where you open the browser? you know...everytime you open up the Internet Explorer browser it says you can check for updates on the Mogul etc...what is that link?! I've searched the manual and can't find it...I set Google as my home page and would really like for it set back to what was originally on it...any help would be GREATLY appreciated. thanks..!