Internet Explorer: This page cannot be d

I have internet explorer 6.0 in my PC and recently getting a message :Internet explorer encountered a problem and will be shutdown.
So, I decided to remove it but there was no uninstall option since it was a downloadable version. I remove it from the register and reinstall internet explorer 5.0.
Now i am getting another problem:This page cannot be displayed or cannot find DNS server.
My dial up connection is ok. Whatever site I am entering the same message is displayed.
Could you please help me to find a solution
My email address:lkalyanee@yahoo.com

Thanks