Okay, I've been doing some online research and the "fixes" are varied and sometimes convoluted. There is a conflict with Flash Player settings and IE but different people claim different settings within both are to blame.Because Windows IE for some weird reason isn't supporting Adobe Flash. I had to switch to the Firefox browser, which I don't like so much.
IE eh? I hope you have some serious protection. I bet if you downloaded and installed Malwarebytes you'd find a boatload of PUP viruses infecting your computer and I'd hate to think what else.
I did the Malwarebytes, but there wasn't anything there. I have AVG and Spybot too.
I use a shortcut for the cookies folder on my desktop so I can manually delete them as needed, plus I delete everything at the end of the day.
But Youtube still doesn't work right with IE.
The general consensus appears to be uninstalling Flash Player then reinstalling (some say use an older version of Flash) and if that doesn't work then switching over to Firefox.