The problems affects Outlook 2003-2010
The error comes in the following ways:
This operation has been canceled due to restrictions in effect on this computer. Please contact your system administrator.
the problem is related to corrupt registry settings for HTML links.
According to Microsoft you need to use this article to fix the issue:
I've found it much easier to follow these steps:
1. Download and run this registry fix for HTML links:
Note that you need to extract the Reg file from the zip, double-click on it and approve the request
to update the Registry.
* This method works fine on Windows XP/Vista/7