In SEB 1.8.2 and 1.9.0 (previous versions not tested), it is possible to open the shortcut menu for the active window using ALT+SPACE. The shortcut menu allows you to (among other things) close the active window. Students can close the SEB window that way. They are then left with the locked down Desktop, so they can't do anything they're not supposed to, but they also cannot return to the exam. A supervisor would have to come and exit the SEB Desktop using the exit codes and restart SEB. Is it possible to add ALT+SPACE to the list of options for keyboard shortcuts that can be disabled?