> I installed Plasma yesterday. All windows lack window decorations. I'm less familiar with Qt environments than Gtk environments, but it sounds like you might be missing at least one package which should have been installed along with the rest of the desktop environment. What is the exact name of the package you installed?
> I cannot move windows around or bring a window to the foreground. Can you move windows around if you hold Alt or Super and click/drag any part of the window? If so, then you are probably just missing whatever provides window decorations. If not (and I suspect not, since you can't even bring windows to the foreground), then you might not have a window manager running at all. I think that Plasma's window manager is called Kwin. What happens if you open a terminal and run $ kwin or $ kwin --replace ?
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