Some infections can damage IE or broke the internet connection...
The best to do is to create a DDS log and past into a new topic in the malware removing forum:1.
Follow the instructions "Preparation Guide For Use Before Using Malware Removal Tools and Requesting Help" and create a DDS-log
Create a new topic into the forum "Virus, Trojan, Spyware, and Malware Removal Logs" and then past the DDS-log into that topic:
===> Go to http://www.bleepingcomputer.com/forums/forum22.html
and click on "Start New topic"
An malware expert in that forum will be helping you with this kind of infection(s).