I would try posting a Logfile of HijackThis to "Microsoft Windows >Viruses, Spyware & other Nasties" page and ask for there help.

HijackThis
http://www.majorgeeks.com/download3155.html

Download but do not run it till a moderator posts and helps you.

look up top of this browser for "tools"
open it up (click on it) next click "internet options".
look at the settings in the "security" tab.
make sure they are set so you can view web pages.

Moving this to the 'Browsers' section so that it can receive assistance.

What do I click on in the secuirty tab?

Thanks,

Lisa

when you click on the "security" tab you should see four icon's at the top.
click on each icon and set the slide bar to "medium" except the icon that says "restricted sites" set that high.
when thats done click on "ok" then log back on to the internet and see
if that helps.
also as advised run a spyware program you could have some spyware on you system that needs to be removed.

here are two that you can view and download "free"

http://www.safer-networking.org/en/mirrors/index.html

http://www.download.com/3000-2094-10045910.html


see if thid helps