You must have misunderstood.
Linux is an open-source operating system. If, for some reason, you no
longer wanted to run the Windows XP operating system, you could
experiment with one of the many flavors of Linux (Ubuntu being one of
them). There's a bit of a learning curve, so you very well may not want
to do it! But in case you're interested in a crash course just to learn,
see:
http://en.wikipedia.org/wiki/Linux
Since Internet Explorer is designed for Windows (and I guess for Macs,
too -- it's been a long time since I used a Mac!), you won't find it is
an option for web browsing in systems running Linux (there's actually a
way to do it, but that involves running a Windows emulator). But there
are other browsers (also open-source) available for Linux.
But, if I were you, I'd just stick with Windows.
Now, if you'd like, there are plenty of other browsers you can run under
Windows besides IE. There's Opera, Firefox, K-Meleon, and a whole bunch
of others. See:
http://www.pricelesswarehome.org/2007/PL2007INTERNET.php
(browsers are at the top)
If you have the time to experiment, check 'em out. But IE should suit
your needs just fine; just make sure that ActiveX is configured
properly:
Security Settings:
Download signed ActiveX controls: Prompt
Download signed ActiveX controls: Disable
Initialize and script ActiveX controls not marked as safe: Disable
Now some people will make a stricter suggestion and tell you to disable
the first one. That's up to you. For more info, see:
http://www.edbott.com/weblog/?p=623
One reason why many people recommend Firefox and other browsers is
because they don't use ActiveX at all. Your call. As long as you
understand ActiveX and its potential risks and whether or not to allow
its installation (on a case-by-case basis), you should be fine.