When the problem occurs, you may be able to view the same website over a standard HTTP connection (which doesn't use SSL), and you may be able to view other websites over an SSL/HTTPS connection.
The problem occurs because the Microsoft Knowledge Base article KB2661254 was installed on the client machine, and the website the client is trying to browse to over SSL has an RSA security certificate that uses cryptographic keys that are less than 1024 bits in length. For more information regarding the security impact associated with the changes made by KB2661254, please see the Microsoft Security Advisory 2661254.
If you are the website Administrator and the website is running on Microsoft Internet Information Services (IIS), please see the More Information section below for information on attaining and installing SSL Certificates.
How to Set Up SSL on IIS7
Article ID: 2744241 - Last Review: 16 Nov 2012 - Revision: 1