I have had the same problem many times. I was able to remove the virus but repairing the damage, e.g., IE or Firefox will not open. I tried a host of things, namely, resetting IE but what I found today was that I went to the C:\Program Files\Internet Explorer\Connection Wizard\Run inetwiz.exe\select Connect Using LAN if you are on a Local Area Network, Check Auto Discovery of proxy server, uncheck manual proxy server if checked. Skip setting of email (optional). Hope this helps although you have connectivity, I had none.