Vista - People Near Me cannot start

People Near Me used to work, but sometime in the last 6+ weeks whenever I
reboot I get a dialog saying "People Near Me cannot start. An attempt has
been made to perform an unauthorized operation." I checked the Event Log for
further deatils but found nothing. When I go into the control panel and try
to click any of the three People Near Me links, People Near Me, Change People
Near Me settings or Sign in or out of People Near Me, I get this same error
message. I have followed some of the trouble shootings tips including
turning the firewall off, but nothing changed. I searched and found very
little about this problem and no solution. Any help would be great.