請教各位，電腦的 YouTube 不 work 了 ，顯示 Hello, you either have JavaScript

顯示 --

Hello, you either have JavaScript turned off or an old version of Adobe's Flash Player. Get the latest Flash player.

I have downloaded new version of Adobe,but still not working. So, it could be JavaScript off, how can I fix it.

Thank you so much.

Daqiu