I'm not familiar with the Microsoft product but have been using Kaspersky for over 4 years and it's worked very well. Using Kaspersky Internet Security 2013 now. I've been able to buy a new license and DVD for use on up to three computers, each year on Buy.com, or similar places, for $20-$30. I never use the DVD but just use the license. When a new version becomes available, I just download that if I want to upgrade. What I've liked about them is that the license entitles you to download the latest software if available during license period. Also, when I contacted customer support once, since my kids use my licenses, also, they only count the "working computers," so if you are using all 3 licenses, and one computer dies, you can still use it on the replacement.
Hello, I got a copy of Kaspersky internet security 2013 for free as part of my tablet purchase. In terms of performance/protection is it worth switching over from Microsoft security essentials?