I have a netbook, with window 7 starter. I was trying to change the wallpaper, and found this application: John's Background Switcher which said that I can make slide show of themes, I guess it's as you set wallpaper with window 7 ultimate. The default wallpaper was still fine until downloading that application. After trying it, error occurred, I couldnt change the background, so I closed it, but then the default wallpaper changed its size, the central image dropped out of screen, can see aaprt of it on `bottom right hand corner. I tried to adjust the image into center, but it didnt work when i right click on desktop - Graphic option - panel fit - "center image". Anybody can help me? how to adjust it back to normal as original?