For advice specific to problems with secure sites, have a look at the first
link - for general advice, have a look at the second:
http://www.mvps.org/inetexplorer/answers2.htm#secure_sites
http://www.mvps.org/inetexplorer/answers.htm#dns
I think your problem may be an aberrant HOSTS file.

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Sandi - Microsoft MVP since 1999 (IE/OE)
http://www.mvps.org/inetexplorer
> Whenever I attempt to access I.E I get the message 403
> forbidden access. Any ideas on what's wrong? I can access
> Netscape OK!