CIS v6 - could not unblock chat from trusted site. Uninstalled CIS but block still present in Win XP system. Will appreciate help in getting rid of this restriction.
On what browser(s) is this happening? Can you see if the Privdog extension is still installed in those browser(s)?
Did you allow your DNS settings to be changed to Comodo Secure DNS during CIS installation?
If yes, try disabling Comodo Secure DNS.
In the final step of the link below select ‘Obtain DNS server address automatically’.
Windows XP - Manually Enabling or Disabling Comodo Secure DNS