Another way to alter the desktop wallpaper in Windows is to open up the Personalize alternative on the desktop (called Properties in Windows XP). To do this, do the following:.
Right-click on the desktop and choose Personalize. (Or in the Windows 10 menu, most likely to Settings > Personalization > Background.).
In Windows 8/7/Vista via Control Panel's Personalization applet, and in Windows XP via the Show Control Panel applet.
Under the Background dropdown, choose Image.
You can choose to use a pre-loaded picture from Microsoft or choose Browse to find a different photo on your disk drive.
You can also determine if you desire the picture to fit, stretch, or load the screen, or even for it to be tiled, centered, or spanned across several displays.
Some versions of Windows have added alternatives here, like instantly altering the desktop wallpaper after so-many secs, which comes in useful if you don't wish to work out with just one background.