Signing on to a new computer using my current email address

Use the existing Microsoft account. A new email address is not required.

Try this path:

1. Verify that the email is already a Microsoft account by signing in at Microsoft Account.
   • If sign-in works there, the account is valid.
2. If Windows setup keeps saying the internet connection is lost, switch the network and try again.
   • Use a different connection such as a mobile hotspot.
   • Avoid public or captive Wi-Fi networks.
   • Then retry the same email address.
3. If setup still blocks progress, finish setup temporarily without using that account.
   • Complete setup with another existing Microsoft account, or
   • Set up the PC with a local account first, then switch it afterward.
4. After reaching the desktop, connect the intended Microsoft account in Windows.
   • Go to Settings > Accounts > Your info and switch to the Microsoft account, or
   • If the device was set up with a local account, follow the Windows steps to change from a local account to a Microsoft account.
5. If the email address is not yet attached to the Microsoft account in the way needed for sign-in, add it as an alias.
   • Go to the Microsoft account how you sign in page.
   • Select Add email.
   • Follow the prompts to add the current email address or create a new Outlook.com alias attached to the same Microsoft account.

Important details:

• An alias is another email address that uses the same Microsoft account, inbox, contacts, subscriptions, and settings.
• If creating a new Microsoft account is attempted instead, an old address cannot be reused for a new account.

If account creation is the only option shown during setup, complete setup with a local account first, then change it to the Microsoft account afterward.

• How to add an email address to your Microsoft account
• How to create a new Microsoft account
• Change From a Local Account to a Microsoft Account in Windows
• "Enter valid email address" during setup - Microsoft Q&A
• Reserved domain name during Windows setup - Microsoft Q&A