As one of Google’s new features on Toolbar 7 for Internet Explorer 8 and 9.
To activate Google Instant, you can do so via the Toolbar Options menu. Once on, Instant works in the same way as it does on Google.co.uk.
Another new Toolbar feature is personalisation. The tools you most commonly use will remain visible, whilst the remaining tools get moved amongst the “More” button.
Then new Google Toolbar is available for download in English, and will be available in other supported languages before the end of the month.