"Microsoft account" is the new name for what used to be called a "Windows Live ID." Your Microsoft account is the combination of an email address and a password that you use to sign in to services like Hotmail, Messenger, SkyDrive, Windows Phone, Xbox LIVE, or Outlook.com. Over time, all Microsoft services will be switching from the old name to the new one. You might continue to see mentions of "Windows Live ID" instead of "Microsoft account" for a while.
There is no tag wiki for this tag … yet!
Tag wikis help introduce newcomers to the tag. They contain an overview of the topic defined by the tag, along with guidelines on its usage.
All registered users may propose new tag wikis.
(Note that if you have less than 20000 reputation, your tag wiki will be peer reviewed before it is published.)