How do I make the Taskbar solid?

Hello all,

First of all I'd like to thank you for letting me join this forum. I appreciate it.

OK so on to my problem and question. I set my taskbar to be along the top of my monitor screen. It seems like ever since WinXP and probably before that, some windows that open creep under the taskbar. So when this happens, I have to move my taskbar in order to close the window. Yeah I know there's other ways to close this window without moving the taskbar, but another more elegant way to avoid this problem is make the taskbar solid so the window can't creep under the it.

Does anyone know what I have to do to avoid this annoyance?

PS: for clarity sake, the taskbar in question is the bar that is at default on the bottom of a the welcome screen. It would have the start/stop button on it.