After installing all the latest updates on Win8Pro OEM loaded from retail installation disk, WinLiveMail stopped working on desktop.
Finally narrowed it down to three security updates for Net Framework 3 & 4.
KB 2729462 Security update Netframework 3.5
KB 2737084 Security update Netframework 4.5
KB 2769166 Update for Netframework 3.5
Problem is I need the updates for security but also haven't found an email client as good as WinLiveMail.