I have downloaded the new Flash Player, but now it doesn't work at all in Explorer-I download it again, and it says "Installation Successful", but when I go to Youtube, the message says I need Adobe Flash Player. Can anyone help?
Its a browser specific issue. Try a different browser like chrome or firefox, it should work.
For fixing IE, lets follow below suggestions :
Run the Flash Player Uninstaller as applicable for your machine(i.e.Windows or MAC) and remove flash player.
Restart the machine.
Download and Re-install Flash Player.
Restart the browser and check.
You might also wanna check the below articles ::
Enabling Flash Player in Internet Explorer 9 : http://forums.adobe.com/thread/885448
ActiveX Filtering in Internet Explorer 9 : http://forums.adobe.com/thread/867968
Moving this discussion to the Installing Flash Player forum.