In Roman numerals, C stands for the number 100. This is based on the Latin word centrum, which means 100.. As of 2014, Roman numerals are still occasionally used, such as seen in the British monarch Queen Elizabeth II.
A Microsoft account is what you use for almost everything you do with Microsoft devices and services. Itâs an email address and password that you use to sign in to Skype, Outlook.com, OneDrive, Windows Phone, and Xbox LIVE â and it means your files, photos, contacts and settings can follow you to any device.
You use security information to: 1  Control access to your account or activities on Xbox.com, your Xbox 360 console, Xbox Live, Windows, and other places where your Microsoft account is used. 2  Keep your account safer and help you reset your password.