It may just be a false positive if you have Spybot Search
& Destroy installed, there is a issue where MS Antispy
detects sites added to the restricted zone and displays a
warning that its trying to enter itself into the trusted
zone, Ive seen this myself last week when I asked someone
to install Spybot and enable the immunize feature, they
got a warning saying 139mm was trying to enter itself
into the Trusted Zone.
Here's a support page from MS that explains this:
http://support.microsoft.com/?kbid=902956
Regards
Andy