I recently downloaded the Norton Security Suite from my ISP. They recently stopped having a subscription with McAfee and started carrying Norton.
I have never seen a worse security suite.
Primarily, it can never be turned off. This is the reason I uninstalled it within 24 hours.
The virus catcher (whatever the name is) will always run, regardless of whether you want it or not, and it thinks that many things are viruses that, simply are not.
There is no option to allow certain files, folders, etc. If Symantec commands it, you shall not execute file :p
While running cleaners, the program tells you nothing about what it is actually doing, it could be destroying important registry keys, but I have no idea, because the contents of my computer aren't under my control while this software is on it.
I know why they've done these things. They've designed it this way to be run by idiots, with as little liability left to them and their reputation. It does not change the fact that this is, by far, the worst security suite I have ever seen.
I will now avoid Symantec ware like a plague.