tion:1.In computing, a window is a graphical control element. It consists of a visual area containing some of the graphical user interface of the program it belongs to and is framed by a window decoration. It usually has a rectangular shape that can overlap with the area of other windows.2.A Microsoft account or MSA is a single sign-on Microsoft user account for Microsoft CUSTOMERS to log into Microsoft WEBSITES, devices running on one of Microsoft's current operating systems, and Microsoft application SOFTWARE. 3.Windows 8 introduced the construct of logging into Windows with a Microsoft Account. ... It also allowed you to optionally sync your computer layout across devices, so your desktop wallpaper, theme, and even your Start Screen layout could all by synchronized across any Windows device you logged into.4.To set new wallpaper for the Home or lock screen, follow these steps.Long-press any empty part of the Home screen. ...You MIGHT be able to set wallpaper from the SETTINGS app. ...If prompted, choose the Home screen or the lock screen. ...Choose a wallpaper type. ...Choose the wallpaper you want from the list. hope it helps u