Just a quick post on how to customise the Lock screen on Windows 8. The instructions are for non-touch devices.
You may not want the stock image for your Lock screen in Windows 8, below are the steps that you need to perform to change it.
Log into Windows 8. Move the cursor to the bottom right of the Start screen, and select the Settings Charm when it appears.
The select the Change PC Settings option.
Select Personalise, and then the Lock screen option at the top, and then click the Browse button.
Select the picture you would like to use instead and click it, then click Choose picture.
The PC settings screen will now show you your new Lock screen.
And thats it, you now have a customised Lock screen.