Windows 8.1 includes several different types of search:
Searching everywhere. Type at the Start screen to display a list of apps with names that match what you type, as well as settings, files, and results from the web. Typing at the Start screen is the easiest way to find anything. On touch devices, open the Start screen and then open the Search charm.
Searching within apps. Open the Search charm when an app is open to search within that app. For example, searching within the Music app finds matching songs. This chapter shows you how to control which apps appear in the search list and which appear at the top of the list.
Searching settings. Open ...