This is way you should download mozilla or firefox and not use Explorer. You can download mozilla or firefox and use it instead.
Please read this artcal on Explorer browser security holes at
Researchers warn of infectious Web sites
http://zdnet.com.com...g=zdfd.newsfeed
Pop-up toolbar spreads via IE flaws
http://zdnet.com.com..._2-5229707.html
Can't stop the pop-ups
http://zdnet.com.com..._2-5226273.html
Yahoo embraces anti-spyware
http://zdnet.com.com..._2-5221271.html
Microsoft to create pop-up safety lessons
http://zdnet.com.com..._2-5201585.html
New IE may burst pop-up bubble
http://zdnet.com.com..._2-5110805.html
That is way I use Firefox browser.