If you have local admin rights and Windows 8.1 Pro, the correct way to do this is to do the following steps:

• Open - Local Group Policy Editor
• Computer Configuration - Administrative Templates - Control Panel - Personalization
• Set the value under "Force a specific default lock screen image"

Full details: https://support.microsoft.com/en-us/kb/2787100/en-us

Original Source: https://social.technet.microsoft.com/Forums/windows/en-us/2590f111-7709-40b9-acee-c2aeaa9a48f8/change-default-logonstartuplock-screen-in-windows-8-pro?forum=w8itprogeneral

If you have local admin rights and Windows 8.1 Pro (does not work in non-pro versions), the correct way to do this is to do the following steps:

• Open - Local Group Policy Editor (gpedit.msc)
• Computer Configuration - Administrative Templates - Control Panel - Personalization
• Set the value under "Force a specific default lock screen image"

Full details: https://support.microsoft.com/en-us/kb/2787100/en-us

Original Source: https://social.technet.microsoft.com/Forums/windows/en-us/2590f111-7709-40b9-acee-c2aeaa9a48f8/change-default-logonstartuplock-screen-in-windows-8-pro?forum=w8itprogeneral

If you have local admin rights, the correct way to do this is to do the following steps:

• Open - Local Group Policy Editor
• Computer Configuration - Administrative Templates - Control Panel - Personalization
• Set the value under "Force a specific default lock screen image"

Full details: https://support.microsoft.com/en-us/kb/2787100/en-us

Original Source: https://social.technet.microsoft.com/Forums/windows/en-us/2590f111-7709-40b9-acee-c2aeaa9a48f8/change-default-logonstartuplock-screen-in-windows-8-pro?forum=w8itprogeneral

If you have local admin rights and Windows 8.1 Pro, the correct way to do this is to do the following steps:

• Open - Local Group Policy Editor
• Computer Configuration - Administrative Templates - Control Panel - Personalization
• Set the value under "Force a specific default lock screen image"

Full details: https://support.microsoft.com/en-us/kb/2787100/en-us

Original Source: https://social.technet.microsoft.com/Forums/windows/en-us/2590f111-7709-40b9-acee-c2aeaa9a48f8/change-default-logonstartuplock-screen-in-windows-8-pro?forum=w8itprogeneral