I am unable to open any embedded link contained in an email. When I click on any link, I received the following dialogue box message. "This operation has been canceled due to retrictions in effect on this computer. Please contact your system administrator." Well I am the administrator. This problem has only occurred within the last couple of days. I can't think what has changed. I am running Avast anti-virus. I have trawled through the various outlook and internet explorer tabs but can't find a solution.