I'm root and I don't have any window
[root@pc]# ps -ef | grep gedit
user 2432 1 0 09:50 ? 00:00:44 [gedit] <defunct>
root 6614 3916 0 14:43 pts/0 00:00:00 grep gedit
[root@pc]# kill -9 2432
[root@pc]# ps -ef | grep gedit
user 2432 1 0 09:50 ? 00:00:44 [gedit] <defunct>
root 6616 3916 0 14:44 pts/0 00:00:00 grep gedit