How to Disable the Windows Lock Screen Using Group Policy
Both Windows 8 and Windows 8.1 display the lock screen when you first boot the computer or resume from sleep mode. Although many users may appreciate this aesthetically pleasing, semi-informative screen with its clock and notifications, if you want to bypass this unnecessary step and more quickly enter Windows, Windows Group Policy has got your back with an inherent rule to immediately display the password entry screen without navigating through the lock screen. If security is not a concern for you, you can take this a step further by not requiring a password when waking the computer.
Disabling the Lock Screen
Press "Windows-R" to open the Run dialog, type "gpedit.msc" without quotes and press "Enter" to load Group Policy.
Double-click "Administrative Templates," "Control Panel" and then "Personalization" from the left pane's Computer Configuration section.
Double-click "Do Not Display the Lock Screen" in the right pane.
Select the "Enabled" option, click "Apply" to activate this rule and click "OK." With this rule enabled, you will no longer see the lock screen, but Windows still requires a password when you wake the computer from sleep mode.
Disabling the Sleep Password
Access Windows' Settings charm and click "Change PC Settings," "Accounts" and then "Sign-in Options." If you haven't upgraded Windows 8 to 8.1 yet, click "Users" from the PC Settings window instead.
Click "Change" in the Password Policy section of Windows 8.1. In Windows 8, click "Change" under the entry "Any User Who Has a Password Must Enter It When Waking this PC."
Click "Change" or "OK" to disable the password when resuming Windows. You'll still need to enter your password when you boot or restart the computer.