Hope someone can help, Ive been hunting this forum for a solution!!

I would like to be able to turn off the admin_demo that appears everytime I want to change something, ie tools, admin settings just one example there are many others. I am sloooooowly finding my way around Im no computer wiz... If I could just suss out this problem first then I'll see how I do. (Ive only sussed out how to post on this forum), must be us brits

Thanking you all in advance.

Desperado zenned terry