Want my scrollbar back

[Siegfried Gonzi]

Hi:

Since a few weeks my scrollbar on the right side of my Emacs window is 
void. I am not sure what is going on under the hood, but I find it hard 
to work without scrollbars, because I use my mouse and have never red 
any Emacs manuals.

What will I have do to in order to get my scrollbars back?

Thanks,
Siegfried