Adobe Flash Player Will Not Work!PLEASE HELP!

[AdobeFlash]

okay , i know i have a virus on my computer probably, butt anyways, i have been doing everything to make adobe flash player work, but it just wont.
i have downloaded it over and over gain, uninstalled and stuff.
i go to youtube to watch video, it says javascript is disabled or i have old adobe flash player, but i have enabled the javascript, and have adobe flash player 11.

i have triedd so many things.

 

[cp]

What is your browser? What version? What platform are you on? You need to give more information if you want help...

 

[AdobeFlash]

firefox, im usinggg windows home premium,

 

[AdobeFlash]

vista that is