Hotmail Only use code has many benefis for you, but first of all we need to tell you what is a Hotmail Only use code. It´s about an extra security related not only to a password but to an only PC system as well.
So you can secure your Hotmail account not only with a password but also with this extra code that works with your PC and only with it. Anyone who wants to enter to your Hotmail account from another PC will have a denied access.
The Hotmail only use code will be given to you through an sms, so your Hotmail account security will be increased by the association of a PC and a cellphone.
This service is not available for all regions, but certainly on America is allowed.