Published: June 02, 2010
Hit this exception whilst trying to spin up a WCF test host in my Windows 7 build. Looks like UAC wants to keep us pinned down but fear not. Run the following at an elevated cmd to sort it:
netsh http add urlacl url=http://+:port/uri user=DOMAIN\user
Subbing in port, uri and in my case I used my logged in user account.
HTH