I have recently bought a new HP desktop that came pre-installed with Windows 7 Home Premium. It is a new pc so I was expecting no issue in this. It also has Kaspersky internet security 2011 on it. Everything is working fine. I had started first moving my data in it. I copied my movies, audio and images in it. But I am not able to apply my own wallpapers. I am doing that by right clicking on the image > set as desktop background. But it is not working.