If you do not like the Windows Vista, 7, 8 logon screens now, but would instead like to enable the Windows XP kind of, classic logon screen (especially if you are security conscious), where all user accounts are hidden from the Welcome screen and both a username and a password are required to log on, then do this:
Force Windows to use Classic Logon Screen
Type secpol.msc in Windows Start Search and hit Enter. This will open the Local Security Policy Editor. Navigate to Security Settings > Local Policies > Security Options.
Now on RHS, look for Interactive Logon: Hide last username. Right click on it and open its Properties. Set it to Enabled > Apply.
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 Log On to Windows dialog box. If this policy is disabled, the name of the last user to log on is displayed.
Again, you may also want to disable the policy “Interactive logon: Do not require CTRL+ALT+DEL”.
If so, you can do it in a similar fashion.
This security setting determines whether pressing CTRL+ALT+DEL is required before a user can log on. If this policy is enabled on a computer, a user is not required to press CTRL+ALT+DEL to log on. Not having to press CTRL+ALT+DEL leaves users susceptible to attacks that attempt to intercept the users’ passwords. Requiring CTRL+ALT+DEL before users log on ensures that users are communicating by means of a trusted path when entering their passwords. If this policy is disabled, any user is required to press CTRL+ALT+DEL before logging on to Windows.
To enable the Ctrl+Alt+Del Logon option in Windows Vista and later, you can also type netplwiz in the Start Menu search box and hit Enter. This will open up the User Accounts dialog box. Select Advanced tab > Secure logon > check Require users to press Ctrl+Alt+Delete > Apply > OK > Restart. This guarantees that the authentic Windows logon prompt appears, protecting the system from programs that mimic a logon to retrieve passwords.
Secpol.msc is available only in Windows Ultimate, Pro and Business. However, secpol is basically just a GUI for the registry settings found in the registry at:
Users of other versions of Windows may do the following. Open regedit and navigate to this above-mentioned key.
Right click > dontdisplaylastusername > Modify > Value Data > 1 > OK.
This should do the job.
Best to always create a System Restore point before working in the registry.