Do you have problem to preview the videos in youtube or other websites displaying this message "you either have JavaScriptturned off or an old version of Macromedia's Flash Player. Get the latest flash player. Follow the 2 steps below"; even you downloaded the flash player befor and still wont work ? it can be solved so easy

STEP 1:

Open internet explorer go to Tools, select security TAB , click on custom level button, Scroll down the Settings list until you find "Scripting" choose the Enable radio button. Click OK then OK, and then reload the page,

If the problem still there then go to step 2

STEP 2:

You may need to upgrade your flash player to do so, please click here to download the latest flash player file MSI from macromedia.com, save the file to your desktop, click on it 2 times and follow the instruction to install it, once you are done open internet explorer and try it

Those are the main reasons why you get that message from youtube or other website that you visit,