Even though the BAD WINDOW UNITS don't work as portals anymore, better safe than sorry. Who knows, they could get hit with a stray NULL CODE or something and you'd be right back in Tentacle City. You take the window down from the wall and lean another one in front of it. There! Now even if they turn back into regular WINDOW UNITS, the HORRIFIC APPENDAGES will just be sent elsewhere in the WINDOWPANE DEMIPLANE. You do the same thing with the other exposed BAD WINDOW UNITS in the room.