Lock The Lock Screen Image

If you share a Windows 8 PC with others and don't want them messing with the lock screen image, you can lock it so that it can't be changed. To do this, simply follow these steps:

 1. Go to the Registry Editor and look for the following key:
 2. If the Personalization key does not exist, right-click on the Windows
    key and select 'New->Key' and name it 'Personalization'
 3. In the right pane, right-click and select 'New->DWORD Value'
 4. Name the new value 'NoChangeingLockScreen' and set the value to '1'
 5. Close the Registry Editor then click 'Yes' to allow the changes