Many forum members have more than one browser installed. Here have I.E.6. Mozilla 1.7.2 and Firefox. Use the Mozilla email in preference to Outlook Express. It works well. The email prog used with Firefox is Thunderbird (a separate download). All the browsers happily co-exist on the PC. I do not allow any of them to be the default. Go ahead and install. Then if one browser becomes faulty you always have an alternative to try.