The restriction was caused by internet explorer.
I did not run internet explorer to begin with and immediately installed Opera. After messing around with program defaults and uninstalling Opera I have got links to open in IE. I don't like this but it works.
This link helped:-...
Dear Clifford and Veedaz,
The firewall settings don't appear to make any difference to my problem. I cannot click the links with no firewall on, UAC on never notify with Windows 7 Firewall control saying enable all for Microsoft Outlook and "Allow programs to communicate through firewall"...
I am having problems changing the restrictions in the Firewall.
When I open the Firewall status it says
Incoming Connections - Block all connections that are not on the allowed list of programs.
Typical Microsoft Outlook – cannot click links in email