Google Chrome

This is one fast web browser. Iv'e just downloaded it a few days ago and i'm impressed, the only flaw is it only allows a few bookmarks but other than that, it's lightning quick and leaves Internet Explorer and Firefox for dead. Well worth a try and you don't have to use it as you default web browser.
Click on the picture below to download, it's not huge and takes little time to set up. You must have at least Windows XP with service pack 2 or better. Click on the picture below to learn more or download which is not a huge file and set up is very quick. I personally give it the thumbs up.