Why Is There A Restriction In Effect On My Computer

[Wikky]

When I try to click on any link in my Microsoft Outlook mail messages, I get a message saying, "This operation has been cancelled due to restrictions in effect on this computer. Please contact your System Administrator". How can I view my links please?

[Buenchico]

Your computer's registry has probably lost the information which tells it which browser to open when you click on a link. See here for a solution:
http://support.microsoft.com/kb/310049

However Microsoft assumes that you want to open links in Internet Explorer. If you're using Firefox try following these instructions instead:
http://support.mozilla.org/en-US/kb/how-make-web-links-open-firefox-default

If you prefer Chrome, try these instructions:
http://support.google.com/chrome/bin/answer.py?hl=en-GB&answer=95417

Chris