You can't directly change the lock screen name in Windows 10. The name displayed on the lock screen is the same as your Windows user account name. To change the lock screen name, you need to change your user account name. Here's how:
Changing Your User Account Name:
- Open Settings: Press Windows key + I to open Settings.
- Navigate to Accounts: Click on Accounts.
- Select Your Account: Click on Your info.
- Change Account Name: Click on Rename PC and enter your desired name.
- Restart Your PC: Restart your computer for the changes to take effect.
Note: Changing your user account name may affect other applications and settings.
Additional Information:
- If you have multiple user accounts, you can change the name for each individual account by following the steps above.
- You can also change the name displayed on the lock screen by using a third-party application, but this may compromise your system's security.