Green Mucus Before Menstration?

Sometimes an application may be "hanging" can not close normalnte, for that There are several solutions but I will mention the most practical:

1) Open a Terminal and typed:
2. xkill
,

Then the terminal will show a message that reads:

Select the window you wish Whose client to kill with button 1 ....

(select the window you want to force their closure) and go problem solved.

2)

Right click on a panel, for example above, and click on "add to panel
"

and choosing the closing force and we click add. When a window cualga and we want to close, simplemete we click on the icon to "force closure" from the panel and we click on the window that is not responding.