Security Update for Internet Explorer
http://support.microsoft.com/kb/903235
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Quote
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Security issues have been identified that could allow an attacker to
compromise a computer running Internet Explorer and gain control over it.
You can help protect your computer by installing this update from
Microsoft. After you install this item, you may have to restart your
computer
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Security Update for Internet Explorer 6 Service Pack 1 (KB903235)
http://www.microsoft.com/downloads/details.aspx?familyid=2a506c16-01ef-4060-bcf8-6993c55840a9&displaylang=en
Security Update for Internet Explorer 5.01 for Windows 2000 (KB903235)
http://www.microsoft.com/downloads/details.aspx?familyid=25982e02-ec6d-44ce-82de-12ddef1addd6&displaylang=en
Security Update for Internet Explorer 5.5 Service Pack 2 (KB903235)
http://www.microsoft.com/downloads/details.aspx?familyid=06f8cd1b-93a0-4522-af7d-603dd5c2bacb&displaylang=en
Security Update for Internet Explorer for Windows XP Service Pack 2
(KB903235)
http://www.microsoft.com/downloads/details.aspx?familyid=c1381768-6c6d-4568-97b1-600db8798ebf&displaylang=en