When I first started using Windows 8 during the early previews in 2011, I said to myself why didn’t Microsoft make the lock screen a slideshow of your wallpapers or photo library? Your wish is my command, you can now do that in Windows 8.1. Lets take a look at setting it up, of course, some persons might not want this feature, but its a great fun functionality that is especially great on Tablets if you want to setup a digital photo frame.
Press Windows key + i on your keyboard or place the mouse pointer in the right hand corner of the Windows 8 screen and click Settings > then ‘Change PC Settings’
Click Lock Screen under Top settings
Drag the knob to the right under Play a slide show on the lock screen to enable it.
You can let Windows choose pictures from your Pictures folder or select a specific folder. I personally have set aside a specific folder, since I might not want everyone passing my computer to see every photo I have stored in my library. To do this, click Add a folder
Select the folder if its listed or Click Go up to browse to where the folder is listed.
Once you have viewed your folder, click Choose this folder
Thats it, your Slide Show is now setup. See below: