I can't remember what I was doing on my mac but i use dropbox for school and randomly out of the blue "silverlight-1.dmg" was placed into my dropbox folder but not in any school folders, just the main menu. I questioned this and i didn't know what silverlight-1.dmg was, so i deleted the file from my dropbox and deleted it entirely. Does anyone know if this is something bad? It was randomly placed into dropbox, but my teachers couldn't possibly drop something in the main folder? Is this some sort of malware?