Internet Exploder... errr "Explorer" has more serious security flaws in it. The last I heard, Microsoft was still trying to come up with a patch.
Have you looked into using an alternative web browser yet?
Firefox is FREE.
There is also a free email client called Thunderbird.
While we are at it... You should already be familiar with OpenOffice.org. It is a free suit of programs for word processing, spread-sheets, presentations, etc. I'm amazed how many people I run into who are using old pirated versions of Microsoft Office. Live and let live; but, for the small business this is a really poor choice of roads to travel. Why not adopt the open-source and completely free to use for personal and business uses alternative? OpenOffice has been around for a long time now. Unless you have all sorts of custom-coded MS Office VBA Applications and/or a serious Access Database, there really isn't a good reason not to switch to Open Office. And if you are one of the few companies that are truly leveraging the power of MS Office, good for you - now pay the piper. ;)