Here's how you can turn off the Windows 8 lock screen. 1. Type netplwiz in the Windows 8 start screen. 2. Launch the application. 3. Choose your user account. 4. Uncheck this option: "Users must enter a user name and password to use this computer" 5. Enter your password. 6. Restart your Windows 8 computer. The lock screen will be off after you've restarted.
For more, see the original article at the link below.
Windows 8 Survival Guide | Gizmodo