Hi,
After installing avast! 4.6 Home Edition and then resetting the computer, I can no longer see my wallpaper. I have tried to set the wallpaper again (and various others), but it doesnt seem to work… all I see is the background colour chosen in the display settings. Stranger yet, the wallpaper can be seen in the desktop properties on the preview monitor.
It does not seem to be related to avast.
Something strange is happening with your monitor drivers or the picture files…
Were you infected before? Did you use another antivirus before avast?
Are you working with XP? Are you the administrator or a common user in this computer?
remove all wallpapers and disable view web HTML on desktop.
reboot computer.
and it will work, you will be able to change you desktop background as you want.
It could be so that if it was html as background and it was infected, Avast removed it, but you have left some settings in the desktop configuration left.