Option 1: Through Registry Editor

1. Open the Start Menu, then type regedit in the search box and press enter.

2. If prompted by UAC, then click on Yes.

3. In regedit, navigate to: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System.

4. In the right pane, right click on dontdisplaylastusername and click on Modify.

5. To hide user name at windows logon screen, type 1 and click on OK.

By default, the value data is 0, which shows username at logon screen.

6. Switch user to get back to logon screen, you will see the change.

Option 2: Through Local Security Policy

1. Input Local Security Policy in start menu search box, open it.

2. Security Settings -> Local Policies -> Security Options.

3. In the right pane, right click on Interactive logon: Do not display last user name and select Properties.

4. Check Enabled and click OK.

Knowledge:

Interactive logon: Do not display last user name

This security setting determines whether the name of the last user to log on to the computer is displayed in the Windows logon screen. If this policy is enabled, the name of the last user to successfully log on is not displayed in the Logon Screen. By default, it is disabled.

The above two approaches to hide user name at windows logon screen are easy, but you have to remember the username as well. In order to prevent the case that you forgot windows 7 password or user name, create a Windows 7 password recovery disk for that account when you finish the above steps.