I use WindowsXP. I change my desktop image to my personal pictures. Three times it has been altered. Often, at the half bottom part of my desktop picture, another picture is pasted on top of it. (They are not offensive, but disturbing). Is that possible? How can that happen? The first was a picture of nice tall buildings, the second was a picture of a band/musician, the latest was just a black cover pasted on the bottom part of my image of my desktop picture which is my personal picture. Thank you. Please enlighten me on this.