[ubuntu] Trash and Administration menu lost

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http://ubuntuforums.org – Hello guys. I'm sorry i post here, the french forum is impossible to reach since i logged in(??). I can't post the verison of my ubuntu, for i - as the title says - i have lost the administration menu with all the options and infos in it. I just don't know why and when it disapeared, but it is no more in my desktop, right to the "applications" and "raccourcis" links (in french). And the trash too ! I just can't empty it and it will promptly cause problems. Could someone please tell me how i can find them both ? Thanks and a very nice end of year to you. (Hardware)