Funny. I thought it was me. The same problem. I've just spent the whole weekend uninstalling- reinstalling --restarting. I've gone direct to the source. Before I started all this I was finding that You Tube kept giving me the Blue-Screen-of-Death unless I went in via Mozilla then it was OK. I tried to install Flash Player 11 so that I could download videos. Now I can't even view them via Explorer OR Mozilla. Watching this space more with hope than in anger (towards my computer that is)
Joy