In Windows 10, you have the option of signing in using a local account, although the operating system strongly recommends using a Microsoft account. You can sync your preferences between devices and reset your password more quickly if you do this.
Microsoft accounts are used to sign into Windows 10, and if you want to switch the email address linked with that account, you may do so. Learn how to modify the address linked with your Microsoft account with our help.
Steps to Changing Your Microsoft Account Email Address

Start by going to your Microsoft account homepage. In Windows 10, click the Start button, then go to Settings, then Accounts, then Your information, and finally click Manage my Microsoft account. If you already have an account, you may sign in by visiting account.microsoft.com.
Once there, select Your Info along the top bar, and then click the Manage how you sign in to Microsoft link. In order to use this menu, you may be prompted to enter your password again.
Your current primary email address and any aliases you may have are displayed here for your perusal. To access your Microsoft account using a contact method other than your primary one, you can create a “alias” account. Select “Add email” to create a new address if you don’t have any aliases available to use as your new primary.
You’ll be given the option to sign up for a brand new email address (@outlook.com) or enter an existing one from another service, such as Yahoo or Google. If you need to use a different email address, create a new account and then go back to the page where you may choose how you want to sign in.
In your Microsoft account, you will notice Make main next to each alias address. The only catch is that the alias email address can’t be linked to another Microsoft account.
Add as many phone numbers as you like to your Microsoft account instead of email addresses if you like.
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Put Login Restriction on Your Microsoft Account
If you’ve already created other aliases for your Microsoft account, then you may use the Change sign-in preferences link on the same page to stop anyone from using those aliases to access your account.
If you never use an alias again, you should delete it. While you can disable a login method, it will still be stored in your account in case you need to use it as a backup login method in the future.
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Taking Charge of Your Microsoft Account

Changing your Microsoft account’s email or phone number is now a breeze with your newfound knowledge. Setting a primary email address that you have access to is a smart idea, along with having a couple backup methods for account recovery.
On Windows 10, you can switch from a Microsoft account to a local account if you choose.