The dialogue shown in the bottom of the picture just came up. It looks unfamiliar, so I run software updater manually which completed and be seen in the above half of the picture.
The reasons the bottom dialogue is suspicious is because the title bar don't have the name of the program; not having usual software updater logo.
I try to check the validity of this dialogue. First thing I thought is to check the process id, see which file evoke it. But how do I do so? I can run htop but then I don't know what to search for.