Recently we have moved our site from a windows 2008 server to a windows 2012 server.
We have a wild card 2048bit certificate from comodo that has sha1 signature hash algorithm.
The site is working at windows vista, 7, 8 at all browsers and at XP at opera, chrome, mozila.
It also work at iOS safari. The problem is at ie8 at XP. It shows error page "Internet explorer cannot display webpage." We also have a .net 3.5 application that also in XP cannot make a System.Net.WebRequest to the same server using SSL.
I have tried a couple of Microsoft fixes for XP such as
http://support.microsoft.com/kb/968730
but with no success.
Any ideas?