I don't know how really to explain this. Lets say I have an active window and I'm typing something on it/or reading. If you have a process in the background and he has completed you will get an tedious pop up window telling you that. This happens if you install a game or any peace of software on the background and I get it. This is a good way to tell the user that the process has completed.
The problem with me (and yes, it's a personal problem) it that I happens to use multitasking a lot. And I'm well aware of which process is running and when it will end. So I don't really need those "reporting things". And the real problem is that they have the power to switch from my active windows to them. And I really hate that. I will also notice them if they just show up in the task bar.
So my question is, how to setup my system so nothing can gain control over my active window and show me something else in front of him ?