I had what appears to be a trojan on my system. After launching IE, suddenly my wallpaper was changed along with my startup page, and various other things. After doing a full scan of my system, a couple of Trojans were found, along with some Spyware. The problem is though even after removing them, I can't change the Wallpaper on my Desktop because there is a tab missing on the Display Properties Window. Any idea how I can fix this? Also, the IE Titlebar text has been changed. Any help appreciated. Thanks.