If you’ve grown tired of seeing the same boring desktop interface provided in Windows, there is an easy way to apply a theme pack to add a little variety to your work space. This method applies to all version of windows from Windows 7 and newer, local sessions and RDP sessions alike.
Step 1 - Right click on your desktop and choose the Personalize option.
Enjoy your new work environment - Your theme has now been applied. Any themes you apply will add themselves to your My Themes list shown in Step 2 for re-use in the future. Windows will cycle through the desktop wallpapers included in the applied theme at regular intervals .