Won't complete installation

Fire fox 3.6.8

32-bit operating system

Vista

Flash player 10

I have downloaded it and it shows up in the Control panel/Programme.
There does not seem to be next to it on the right side any size of the download no MB size.

It hasn't appeared on my desktop as a short cut and when I go to camtasia to play a video it states

The Camtasia Studio video content presented here requires a more recent   version of the Adobe Flash Player. If you are using a browser with   JavaScript disabled please enable it now. Otherwise, please update your   version of the free Flash Player

I have downloaded it. There seems to be a slight hitch in the final process.
Oh, and java script is activated.

Hope someone can help.

jenki1