White box with red x in place of all videos

I am running windows xp - 32 bit,  I have installed the latest version of Flash. [ and reinstalled it multiple times]   I updated the display drivers, Nvidia and also updated my version of Java.    I can not get videos to open -- I receive a white box with a red x for videos -- doesn't matter as to type of site I am accessing.   The same results occur in IE 8, Chrome and msn-explorer.   I have Norton 360 on my system.

I checked the add-ins and  Adobe Shockwave is enabled.

When I go to http://www.adobe.com/shockwave/welcome/   the area where the shockwave moving image should appear is completly black.  When I go to http://www.adobe.com/software/flash/about/  sometimes I see the "Version Information" details  and sometimes this does not display.   Even if it displays I still can not see videos.

Right clicking  in area where video is to display, indicates Flash version that I am running.

I have tried everything I can think of to resolve this issue and have not been successful.    Any suggestions would be greatly appreciated.  Thank you.