BOOTING. The user name for the Microsoft account must be a valid e-mail
address.
To create a Microsoft account during BOOTING, select Sign up on the log in
page.
To create a Microsoft account after BOOTING, go to Microsoft’s sign-up
page at Microsoft.com/account.
Either way, you’ll be directed to Microsoft’s sign-up page for a Microsoft
account. On the page, you’re required to enter your e-mail address as the
user name and set a password. You also need to fill in some personal
information. Before the account is created, you need to check your inbox for
a message from the Microsoft account team. Follow the instructions in the
message to finish setting up your account.
If you don’t have an e-mail address, click get a new email address. This way,
you will get a Microsoft account and a Microsoft-hosted inbox at the same
time. Note: The rationale for using an e-mail address as the user name is that
it ensures each Microsoft account is unique.
Switch to a Microsoft account
If you sign in with a local account during BOOTING, you can choose to switch to a
Microsoft account anytime after BOOTING.
Step 1. Click Start ➙ Apps ➙ Settings ➙ Accounts.
Step 2. Click Sign in with a Microsoft account.
Note: Internet connection is required the first time you sign into a device with a Microsoft
account.
Add other user accounts
For security concerns, you may need to create a Standard User account for use after
BOOTING; or if someone else needs to use your computer, you can add a user account
for that person. The added user account can be a Microsoft account or a local account.