PLEASE HELP!!! JAILBREAK DELETION!!!?

please help!!! i just downloaded the redsn0w jailbreak 4.3.3 to my computer and my nortons security thing said it isnt safe so i tried to delete it but it says the file can not be found but its right there on my desktop and im freaking out cuz my parents are gunna be home in a bout an hour and i cant let them see this virus or whatever it is! PLEASE HELP!!!!!!