We have tested our old Surface Pro side by side with our new Dell laptops. The Surface pro is able to establish a PPTP tunnel, the Dell Laptop is not. There is some chatter on the internet that Dell misconfigured the laptops but Dell support techs don't have a clue.
The is also some chatter that Microsoft recently changed their default configuration of Windows 10. Microsoft support says that they supplied all of the necessary information about the change to Cisco and Cisco should be able to solve the problem.
At the end of the day, we cannot use our new laptops in the field. We are waiting on Cisco support to call back.