samichna - whats url of your search engine problem
hhhmm check the bottom of the search engine that you get when u go to google.com Check the bottom for like terms and agreements and shit like that. See if it says anything about how to get rid of that 'search engine' as being your default search engine. Happened to me with a different search engine i went to the FAQ/terms of agreement at the bottom of the page. Said if i wanted to get rid of it i had to uninstall some software or somthin.... You install any software recently???