Review by mouse user

I use this on Windows 7 and Windows XP boxes at home. Works well on both multi-core i7 processors and Netbook Atom processors. I usually buy on-line versions just to get a new product key each year. I can leave the existing software installed and just enter a new product key. The only minor annoyance is Norton is sensitive to Firefox version changes. Norton is usually about a week or two behind Firefox upgrades, so for that time, the Norton integration in Firefox is disabled if I upgrade Firefox the day a new version is available. But I suppose Symantec (the maker of Norton products) is testing their software in the new version of Firefox before allowing their software to be enabled for the browser.