Try IE Reset:
http://i43.tinypic.com/w8kzfo.jpg (http://go.microsoft.com/?linkid=9646978)
Then restart Internet Explorer
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More info from here: http://support.microsoft.com/kb/923737
Or manually Reset IE settings info here
http://www.techspot.com/vb/post682762-2.html
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Here's an excellent update to your Hosts file that might want to try (it may also resolve the issue)
>> Hosts (http://www.mvps.org/winhelp2002/hosts.htm)
Direct download HERE (http://www.mvps.org/winhelp2002/hosts.zip)
Download; Unzip; and run MVPS.bat
Also note, quoted from the Hosts link:
# Start | Run (type) "services.msc" (no quotes)
# Scroll down to "DNS Client", Right-click and select: Properties
# Click the drop-down arrow for "Startup type"
# Select: Manual, or Disabled (recommended) click Apply/Ok
Then Restart