your problem is window update, why blame it in avast??? :'(
avast do nothing in window update,
in my experience of using window7 avast need also the windows update so that it will be adopted by the OS
and i do not see any reason that avast will block your update
![Wink ;)](https://forum.avast.com/Smileys/default/wink.gif)
just observe the video you play maybe its broken and WMP won't play it
![Wink ;)](https://forum.avast.com/Smileys/default/wink.gif)
try play in VLC even broken video it will play but until in the readable amount only
![Kiss :-*](https://forum.avast.com/Smileys/default/kiss.gif)
bong2x