I'm new here and sorry if this is in the wrong place but I am having a problem changing my desktop wallpaper. The problem is, I can't. A blue wallpaper covers my picture that I have used for a while (I can see it when I start up and shut down but not in between). I don't know what is causing it but it started when I wandered into something called "pesttrap" and my computer freaked out. I have uninstalled pesttrap and purchased a anti-spyware program but am unable to fix this one problem. Any suggestions?