earl: regarding keeping IE, you don't have a choice. IE (6, at least) was intimately tied to Windows itself. Ahh... Monopoly.
Anyway, that error sounds like you have some problems with your computer, no matter what the browser.
Get yourself (and use!) a liberal dose of software that will check for viruses and spyware:
AVG's kickarse free antivirus: http://grisoft.com/doc/products-avg-anti-virus-free-edition/lng/us/tpl/tpl01
Lavasoft's free spyware killer (Ad-Aware): http://lavasoft.de/products/ad-aware_se_personal.php
Download, install, update and run those. I wouldn't be surprised if you have a few 'things' running about on your computer. You may need to run them both a few times to flush everything out.
While you're at it, make sure you have a firewall installed. Sunbelt's Kerio Firewall is great (and free). Get it from http://www.sunbelt-software.com/Kerio-Download.cfm . It has extra features that will stop after 30 days, but the firewall itself will still work.
After installing it, you will need to authorise various programs to go out onto the internet (which you probably want to always allow) but you will also be asked whether or not to allow incoming connections. Generally, you want to always say no to them.
It's an accepted fact that on average, these days an unprotected Windows computer will be compromised (by spyware, viruses, trojans or some other 'hacker' activity) BEFORE it can download all of the updates to keep it secure. Something like 13 minutes, last time I read.
Anyway, that's something to think about