Thanks . Although I’m not running a firewall or virus-protection, it used to work before.
I can build a C++ console application “Hello world”.
I also used 4.8, 4.9 and 4.10 without any issues. Although 4.8 and 4.9 where in VS2013.
I think this started when I cloned the Henry project, it seemed to have added Incredibuild to my system. I did disable the agent and uninstalled the addons for VS2015. Not sure where to go from here. I couldn’t find a proper way to uninstall Incredibuild completely.