October 26, 2012, 3:28 PM — 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