win8 youtube , tune-in 等媒體串流有問題的 可以注意一下這一篇
Windows 8 Apps (Netflix, Hulu, Youtube, TuneIn) will not stream

............
"So until AMD gets their act together:

Uninstall your video driver using the AMD uninstaller.
Let Windows install one for you.
If you want the other AMD software, run the Catalyst installer on Custom and make sure that the AMD Display Driver is not selected."

前面網友有問題的 如果源自 AMD driver 照這篇處理就可以解決了'