Hello, you either have JavaScript turned off or an old version of Macromedia's Flash

Seems like every time I've tried to watch a YouTube video recently, no matter what computer I was using, I got this error message.  So I'd click on the link to install the latest Flash player. And it would run through the install and confirm it was successful.  I'd go back to Youtube and nothing changed.  I verified Javascript was enabled, after all it'd be pretty hard *not* to notice Javascript being off these days.  So what's up?

I run Windows Live Care on all my home machines so I thought maybe that was it. I granted exceptions to YouTube.com and tweaked every setting I could imagine.  After not getting anywhere, I tried just shutting it off. And of course, nothing.  I rebooted over and over, flipped off and on every setting I could think of, and none of them fixed the problem.

After searching around, I found that the problem is that the download link specified doesn't install the Full version of Flash.  So you need to simply install the full version of Flash and viola.  Why that's the case is beyond me.  Here's the link that tipped me off to the solution