ok, its not that hard, just follow the steps and u will be fine again
1. Start > run > type regedit
2. find
[HKEY_CURRENT_USER\Software\Policies\Microsoft]
delete theInternet Explorer folder
3. find
[HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main]
"Start Page"="the page u want"
now enjoy ur browser is back to normal