Windows Live Essentials allows you to add programs to Windows, including Movie Maker, Photo Gallery, OneDrive, Family Safety, Mail, and Writer. Support ended in January 2017.
Windows Live Essentials, sometimes called Windows Live or Windows Essentials, is a small downloader from Microsoft that allows you to add programs to Windows including Movie Maker, Photo Gallery, OneDrive, Family Safety, Mail, and Writer. Back in the day, you used to be able to download each tool individually, but now you need this installer. You can download them all or simply check or uncheck what you want or don’t want. See screenshots at the bottom of the page, for example.