I am Sue, new to this forum. I have the same problem. (mod edit: reference to this topic)
I had attempted all the above suggestion and my problem is not solved.
I still unable to open any web pages except secured sites.
Edited by Andrew, 02 April 2011 - 02:31 AM.
Mod Edit: Split from topic http://www.bleepingcomputer.com/forums/topic385926.html - AA