I got a nasty virus about a week ago but I'm still unable to change my desktop background. When I goto display properties background is grayed out and i'm unable to scroll up or down in the box of pictures. The only thing I can do is set the color of my blank background. Does anyone know how to fix this? I have run Avast and it seems to have deleted most of the main stuff but I feel it is still missing something. Any help would be great! Thanks!