This solved it for me:
Go to the following registry:
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Office\15.0\Common\COM Compatibility{8856F961-340A-11D0-A96B-00C04FD705A2}
Then set the value data from 400 to 0.
Hope it helps.
Sorry forgot to give credit for the one who found it. Here.
http://social.technet.microsoft.com/Forums/office/en-US/7942c472-2b5a-4005-888f-43ece2a5800a/adding-web-browser-control-to-excel-2013?forum=officeitpro&prof=required