|Are you running Service Pack 3? Microsoft has deleted the links for it, but you can get it from the Internet Archive here: https://web.archive.org/web/20140119014510/http://download.microsoft.com/download/d/3/0/d30e32d8-418a-469d-b600-f32ce3edf42d/WindowsXP-KB936929-SP3-x86-ENU.exe|
The Internet Archive was designated as a library in 2007 and is a 501 (c) (3) organization.
The most likely reason for your issues is that Internet Explorer requires XP Service Pack 3 which is SHA-2 compatible. Internet Explorer under XP Service Pack 1 and 2 will not be able to open SHA-2 websites (SHA 256). Internet Explorer is dependent on the operating system for SHA-2 compatibility.
Chrome WILL work because that browser (and others such as Firefox and Opera) are NOT dependent on the operating system for SHA-2 compatibility.
Internet Explorer is no longer updated on XP (hasn't been for 2 years), and I recommend using Chrome, Firefox and Opera on XP. Most websites don't even support Internet Explorer 8 anymore, anyway.
Windows XP Service Pack 4 (SP4)