I am on Window Vista, and so far, I always stuck with IE. I have been using IE8 since it was available through Windows Update, and it works rather fine. Now, with the recent browser choice tool for the European Union, which I installed through Windows Update, I took this opportunity to install Firefox and Chrome. I must say I really like Chrome, which has a simple and clean interface, and which is faster than IE8 and Firefox ; although it is still not perfect, but is there a perfect browser? I haven't tried Opera, Safari or any other one (Avant Browser, K-Meleon, etc.) yet, maybe I will do it.