I am using different desktop environment. When I log out from one to log in another, I see the new name so I log into that. But now I can not remember the name.
Now I can not log out from the environment. And can not do other things. Mouse works, but with right click nothing appears.

Present state of my desktop:

Only top date bar shows. When I use arrow key in time of restarting those writings show.
Main thing is, I try to install tor browser. And after install I can't run it. So I try to change desktop environment.