B1S Windows Server is not a viable VM
B1S is just too small of a VM to be viable. Provisioning it in Central US takes 27 minutes, and then when it finally starts everything is so unbearably slow that you can't do anything. Takes minutes for Task Manager to start and paint itself. I don't know why it's being offered when it's so underpowered that it is really impossible to use.
Ale Viana commented
What Windows version did you use?
I agree. I had exactly the same problem.