Set up an account to use Single-Use Code
To use this function, you can access here and select the Windows Live Account overview link:
Here, please check Password reset information and click on Add link in Mobile section:
Enter your mobile phone number and click Add , then the system will send a confirmation email to your mailbox:
So we've finished the basic part, let's move on to the next section.
Use Single-Use Code on any computer
To use this function, every time a user accesses and a Windows Live website or any Windows Live service, select the Get a link to use the code to sign in with:
After declaring the login ID, click the Get one here link next to the Don't have a code?
Fill in the email address and phone number here, then press the Send text message button :
Check the return message from the system on your phone:
And then use this code to log in to your account:
As soon as you enter the code, the system will confirm and cancel the validity of this login code. So you won't have to think too much about someone trying to get the main login password. Good luck!