Here is a useful bookmarklet to turn off Google’s instant search (another annoying feature from Google) the following bookmarklet consist of two buttons, one to take you to Google preferences, and the other will set the settings automatically, it will turn off instant search and turn off safesearch (adult filter). this is useful when working in incognito mode or private browsing .
Drag each of the buttons above and drop it onto your bookmark bar. Obviously you should FIRST go to Go pref then hit Go Set. When you first visit google preferences directly, you might see a message that claims that your cookies are disabled, ignore that. it still works unless your cookies are actually disabled.
I updated the bookmarklet so now it works with Google new setting page.