You might be aware that Windows 7 allow to search for application or file from Start menu itself. Windows 7 also facilitate you to search the internet.
You can enable this feature using group policy editor. Open a Local Group Policy Editor by typing "gpedit.msc" in Run Command from Start Menu. You can also find the Local Group Policy Editor by searching for "Group Policy" in Start Menu.
Once Local Group Policy Editor is opened traverse to User Configuration -> Administrative Templates -> Start Menu and Taskbar .
In the right pane, enable he policy "Add Search Internet link to Start Menu".