The focus is on Anti-Virus, Anti-Spyware, and Firewall Security, or in other words, overall protection of your PC. It doesn't have to be limited to those three. Anything that you use to keep your PC secure is eligible.
Whether you are using an all-around security bundle, or if you use individual applications simultaneously to create you ideal PC defense, lets hear about it.
Free or paid it doesn't matter, just be sure to list which ones you use and(or) which ones you prefer.
Windows only software please, and don't forget to list the pros and cons of said software(s). The purpose of this discussion is to create a database of sorts in order to help the undecided. After all, with all of the different options out there, how does one decide on what is best, let alone what they need, but through reading reviews?
My personal favorite is Norton Internet Security 2010. I used to hear so much flak for Norton, and the criticism was well deserved, but in their new products, they are making a point of leaving a smaller PC footprint. In fact, I found that Norton Internet Security had quicker scan times, a better interface (easier to navigate, and nicer cosmetics), and it was a bit lighter on my system. I am not really able to compare scan and removal effectiveness except to say that they are both on par.