Hi I really do not know if could work but it occurs to me the following.
1.revisa first your proxy server if you have the proper settings.
2.desinstala the update and try to see.
3.instala the update.
4.restaura the system as if it came from the factory
5.si will not test this.
6.si did not work anything like that the most likely problem is that developers thing smells like that if so you would have to wait for the next version.
or to save all of the above that you can access from chrome youtube problem even if the experience can be uncomfortable at first