I've been using Norton's products since DOS 3.1, and I swear by it, warts and all. Let's face it, Peter Norton pretty muuch invented Antivirus, not to mention all the other things that it can do, like SpeedDisk, HexEdit, and so on. I didn't have any trouble installing the latest Couatl at all with it. I didn't try with older versions though. There are numerous other software to do all that stuff available now, but Norton started it all off!
Pat☺