Tell me the Exact Error Message that comes when you are trying to access Google Chrome? also provide us with the version details of the McAfee programs. In the meanwhile you can also check whether Google Chrome has Full Access (or) Blocked under the Firewall settings.
Click On Firewall ---> Settings ----> Click on Program Permissions ----> Select Google Chrome (check whether it has Full Access or Blocked). Click on Edit to change the Access. Let us know if that helps you...