On a Windows 10 Home device that signs in with a Microsoft account, the name and email shown on the sign‑in/lock screen come from the Microsoft account profile, not from netplwiz or the local “Full name” field. Changing the local account name will revert as long as the account is still tied to the Microsoft account.
To stop showing the email address and instead show a name, there are two supported approaches in the provided information:
- Change the Microsoft account display name (keep using Microsoft account) This keeps the account as a Microsoft account but changes the name that Windows shows:
- Sign in to Your info in the Microsoft account: use the Sign in link in the “Personal account” section of the article.
- On the Edit name screen, update the first and last name to what should appear on the device.
- Save the changes.
- Allow up to 24 hours for the new display name to propagate and then restart the PC.
- Switch from Microsoft account to a local account (no email tied to sign‑in) If the goal is to avoid having the Microsoft account email associated with the sign‑in at all, use a local account instead (similar to the other person on the device):
- Open Settings → Accounts.
- Go to Your info.
- Choose the option to sign in with a local account instead (as described in the referenced Q&A about removing Microsoft sign‑in).
- Create a local username and password.
- Sign out and sign back in with the new local account.
Linking a separate local account to an existing Microsoft account in a way that overrides the Microsoft account’s display name is not described in the provided material. The supported methods are either editing the Microsoft account display name or using a local account.
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