I have seen most of the multinational corp and govt.
Updating Norton anti-virus can be done easily from its interface.
Unless I am some sort of kaspersky fanboy I will never be too inclined to the idea of using Kaspersky over Norton.
I do not ever use the computer for gaming purposes. -" Know that you will most likely never even encounter most of these so-called threats..." Well, that's what you think... But if I ever came across an issue where the file was quarantined, norton always provided with a restore option, so I don't see any harm done.
However, it is not really random at all if you know the formula and only the 'creator' knows the number.
The device has a clock that changes to the next number at known time intervals.