Windows 8 displays a tile that drops whenever you lock the screen. In order to get back into Windows, this tile comes between you and the login screen. It makes perfect sense for tablet or touch screen device as it brings up notifications while you are not using your tab, but it’s not very useful on a standard desktop. There is a way which lets you go back to the older style of lock screen which included your Picture and a simple password field.
To turn it off, hit Windows Key + R or right-click the lower-left corner of the desktop and select Run.
Enter gpedit.msc in the text field and hit OK and it will take you in the Local Group Policy Editor Window. Once you are in editor window navigate to Computer Configuration > Administrative Templates> Control Panel > Personalization and then double-click the Do Not Display the Lock Screen option.
A new window will appear in which you can see three options there: Not Configured, Enabled, and Disabled. Select Enabled and click OK and it will turn off the window shade style Lock Screen and give you a basic login page in which you can simply type in your password to log into your PC.