For the automated calls, you can just leave the phone off the hook so their system is tied up longer with your call.
I've gone along with the Windows scammers for a while. I then suggest we end our call and that the scammer should call the police and tell them what they're doing. Not very imaginative. A friend went along with it to the point where the security is breached, just to see what they were doing. I don't suggest that unless you have a very good idea of how the computer works.