If you have not yet tried IE8 out then you may want to give the RC1* Windows Internet Explorer 8 a try
- Faster for accomplishing tasks, from mapping a location to checking the status of an auction. In side-by-side measures of speed, IE8 was as fast or faster than Firefox in opening top websites more than 50% of the time. The rest of the time you need an ultra-slow motion video camera to catch the difference between IE8, Firefox and Google Chrome.
- Easier to find information, to navigate, to search, to work with tabs. Accelerators and Web Slices blur the lines between the online services that make each person's browsing unique and the browser itself, making the IE8 experience richer.
- Safer and more reliable with advanced privacy protection that no other browser can match.
So try it out for your non Windows 7 machine at http://www.microsoft.com/ie8
*RC1 = Release candidate software is at a stage in the development process where it is ready to be evaluated by users while it undergoes final testing.