Another +1. I had a trial version installed on my Windows 8/8.1 machine when I purchased it. Twice it intervened when it thought I was doing something foolish on the web. The first time, it completely blocked me from accessing a website it viewed as threatening. When I say completely, it means there was no option offered for me to proceed at my own risk. Period. (Note: This was not a porn website or anything like that. Later on I visited the same site on my Linux machine and it turns out there were cracked copies of Windows XP available for download. Perhaps they contained viruses/malware?)
The second time it blocked me from downloading a utility from Zemana's website that tests their keystroke encryption software. I guess it takes a very dim view of any form of software that is capable of cracking encryption as well.
My experience has always been that the Home Versions (norton up through/including 365, which is provided for free by most U.S. broadband providers) contain a lot of default bulk that slows the PC (e.g. resource warnings of high cpu usage, password keeper that nobody notices). On the other hand the Business Products (Symantec up through/including Cloud, to which I'm currently subscribed on 2 PCs and possibly a third soon) is invisible and truly unobtrusive