<!-- from fixya rte -->How to change wallpaper on HP windows 8 - HP Computers & Internet

To change the wallpaper (desktop background) on your HP computer running Windows 8, you can follow the steps below:
1.Right-click an empty area on your desktop and go to "Personalize".
2.Click "Desktop Background" and a settings window will come up.
3.You can change the desktop background image by either selecting one of the standard backgrounds that are displayed on your screen or by clicking "Browse" and navigating to a picture stored on your computer.
Important: If you wish to create desktop background slideshow, you need to select more than one picture.
4.To select or change the way your desktop background image appears, you can use "Picture position" drop-down menu. If you are creating a slideshow, you can set a time of your choice in "Change picture every:" drop-down menu.
5.Now, click "OK" to save your settings and close the window. Your new desktop background will get set.

To get a pictorial explanation of the above procedure, you can refer to "Changing the Windows 8 Desktop background" under "Changing the Windows 8 Desktop" section on the following HP support page:
http://h10025.www1.hp.com/ewfrf/wc/document?cc=us&lc=en&docname=c03366869#N569

Hope this will help you.

GuruAid.com

After you click on the desktop app and can see your desktop (don't confuse it with the apps background, you can't change that), right click on it, chose "personalize" then in the window that comes up you'll see "Desktop Background" at the bottom and click it.
From there you can use the "Browse" button on the top to find images you want to use. You can choose multiple images to load and set how often they can change.