Window Manager - Reset to Default

How to reset Window Manager.

If no window decorations appear ie:task bar, tool bars etc.

$ gconftool --recursive-unset /apps/compiz $ gconftool --recursive-unset /apps/metacity $ gconftool --recursive-unset /desktop/gnome/session $ gconftool --recursive-unset /schemas/desktop/gnome/sessionfreekbox:~$gconf-editor

Category; Tech-support