1. Right click on a empty space on the desktop and click on Personalize. (See screenshot below)2. Click on the Desktop Background link at the bottom of the window. (See screenshot below)
NOTE: The name in gray under Desktop Background is the current desktop background file name.3. You will now see this window. (See screenshot below)
4. Select a Picture Location -
A) Click on the drop down arrow menu to select from the list of available picture folder locations, or click on the Browse button to navigate to the picture folder location. (See screenshot above)
B) Select the picture folder and click on Select Folder.
5. Select Desktop Background Pictures -That's it,A) Select more than one picture by right clicking on an available picture, or clicking on the check box (to check) in the upper left corner of the picture. (See screenshot below and below step 3)6. Select the Picture Position -
A) Click on the drop down arrow menu, and click on the picture position you want for the desktop background images. (See screenshot below and below step 3)7. Select How Often to Change Pictures -
A) Click on the drop down arrow menu, and click on how often you want the pictures to change. (See screenshot above and below step 3)8. To Shuffle the Pictures -
A) Check the Shuffle box to shuffle the selected pictures to change in a random order. (See screenshot below step 3 and below step 6)9. Click on OK to apply the changes. (See screenshot below step 3)
NOTE: Uncheck the Shuffle box to have the selected pictures change in order.
10. Close the Personalize window when done. (See screenshot below step 2)
Shawn
article source:http://www.sevenforums.com/tutorials/452-desktop-slideshow.html