You can purchase apps or get free apps from Windows Store.
If a local account is being used, a window to switch to a Microsoft account appears while using Windows Store. Follow the instructions on the screen to switch the local account to a Microsoft account.
You can also do so by selecting [Start menu] > [Account] > [Change Account Settings].
If you switch to a Microsoft account, your PC settings (background, user settings, etc.) may be changed to the previous settings.
Press the [] button to move to the Start menu and select the [Store] tile.
Press the [] key or [Ctrl] + [Esc]
to display the Start menu.
On the Store screen, select a category or app of your choice.
On the app details screen, select [Get] or [Buy].
App installation starts in a moment.
You can see the installed app in the app list on the Start menu.