Secure sites: Make sure your firewall is not blocking port 443.
Go to Start | Run and enter these commans (press <Enter after each one).
Regsvr32 SOFTPUB.DLL
Regsvr32 Wintrust.dll
Regsvr32 Initpki.dll
Regsvr32 Dssenh.dll
Regsvr32 Rsaenh.dll
Regsvr32 Gpkcsp.dll
Regsvr32 Sccbase.dll
Regsvr32 Slbcsp.dll
Regsvr32 Mssip32.dll
Regsvr32 Cryptdlg.dll
See also
http://windows-help.net/WindowsXP/troub-10.html
http://www.mvps.org/inetexplorer/answers2.htm#secure_sites
http://www.mvps.org/inetexplorer/data/jjblack.htm
HOW TO: Troubleshoot Situations Where You Cannot Connect to Secure Web
Sites by Using Internet Explorer in Windows XP
http://support.microsoft.com/?kbid=813444
"The Page Cannot Be Displayed" Error Message on a Secure Web Site
http://support.microsoft.com/?kbid=303807
How to troubleshoot problems accessing secure Web pages with Internet
Explorer 6 Service Pack 2
http://support.microsoft.com/?kbid=870700
--
Frank Saunders, MS-MVP, IE/OE
Please respond in Newsgroup only. Do not send email
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Protect your PC
http://www.microsoft.com./athome/security/protect/default.aspx