Links are Prefixed with BLOCKED::

When you receive an HTML message, links in it may not work or the File, Open dialog will open, asking to associate an executable file with the link. Looking at the source, you'll see the URL is prefixed with BLOCKED::, like this: <A title=http://office.microsoft.com/ href="BLOCKED::http://office.microsoft.com/">Office Online</a> This is a security feature in Outlook and may  

This operation has been cancelled due to restrictions

How to fix the error: "For more info, please contact your help desk" or "This operation has been cancelled due to restrictions in effect on this computer. Please contact your system administrator." comes up when you click on a hyperlink in Outlook and other applications.