I have a trojan virus on my computer. I've had it for a looonggg time...like 5 or 6 months. but anyways, my norton antivirus cant get it off and everytime i try to get it off it keeps saying that "an internal problem" or somethin like that has happened and norton cant start up anymore...and in order to get it back up, i had to uninstall it and then install it again. now the problem is, whenever i try to install it again, it keeps saying that "norton antivirus has encountered an internal problem an cannot be installed" and now i dont have any type of virus protection on my computer watsoever. WAT CAN I DO!??!?