Changing the Wallpaper in Windows 7 Starter Edition is not as easy as it use to be, on previous Operating Systems. I don’t even want to comment on that.
Here is the solution:
1. Download and Install Starter Background Changer
2. Once installed, Right click on the desktop and Click on Personalize.
3. Then Click on Wallpaper.
4. Click on Choose to Browse for the image you would like to set as a wallpaper.
5. Once you have selected the image click on Validate the modification.