Free remote help?

Question

System administration

The situation is a Windows computer connected to the Internet, with an IP unknown to you and closed port forwarding, in front of it is an inexperienced user in years who knows how to launch a browser and drive into the address bar what you dictate on the phone. You can also pre-install something free on this computer.
Task: how to get remote access to this computer and fix the broken enikey?
Only free solutions.

Answer 1

windows remote assistance (built into OS)

Answer 2

If free "services" - then the doctor prescribed teamviewer.
If not, then buy it.

Answer 3

Ammy admin, simple, fast and beautiful

Answer 4

take a teamviewer, since it works when the computer is locked or it can start the task manager, my ammi breaks off or becomes inactive if you select "run as administrator", i.e. it depends on proactive defense.

Answer 5

+ 1 to Ammyy, I practiced it to help my wife (of course, she is not in years, but the user is inexperienced))))) all the benefits are listed here www.ammyy.com/ru/admin_features.html