I am not an IT specialist, but after reading this thread, I installed this program to test its capabilities.
It is really a very useful tool for remote assistance or remote access to your computer.
In my opinion, there is absolutely no risk of uncontrolled access.
The program has a double password system - a variable password and a fixed (personal) password.
The personal password is set only by the owner of the computer and should not be shared with anyone.
As the name implies, the variable password is only one-time and it is different every time you log in. So there is no fear that the "remote person" will gain uncontrolled access to the computer. Before each session, you must give your friend a new password, otherwise he will not connect to your computer.
Ka_kalinka wrote: Well, a very nice and helpful friend, but too inquisitive.
In that case, I will uninstall TeamViewer.
Thank you very much for help.
You do not need to uninstall the program, you just need to change your personal password if you previously gave it to your friend.
I also recommend, as previously advised
bruno7 , disable the option to start TeamViewer at computer startup. It is necessary only when the owner of the computer wants to remotely service it himself.