On the Windows 10 Lock Screen, you can have either a picture or a slide show. If you would like to have a solid background, there is no option for this. Here is what you need to do: Click on the Start Menu and then type lock screen Choose "Lock screen settings" Make sure that under "Background" you have chosen "Picture" Under the pictures, choose "Browse" Browse to C: > Windows > Web > Screen Choose the blue solid picture (this is called "img105.jpg" on my machine). Click Read more [...]