Why doesn't my Audio & Video work after installing Windows 10?

[WPCentral Question]

I have checked troubleshoot sound problems and couldn't detect any issues.

it says no pen or touch for this. Need help to fix this and video issue please

 

[biblejan]

I'm having the same problem. No video. I have a Toshiba AMD quad core; upgraded from Windows 7 to 10 about a week ago. No video. Doesn't matter whether I try to play from FB or YouTube or just my own, still no video. What's the deal?