Hello everyone,
I started to have this problem since 2 months ago.
Everyday the first time I turn on my desktop computor, after 30mins to 1hr several problems will occur.
1. Can't shut down computor.
2. Able to press ctrl+alt+del, but no responce when press task manager no responce.
3. sound system down. Started no sound for whole system. ( press Right bottom corner sound control panel also no responce)
4. Many problems start to no responce and hanged.
I kept my windows 8 to do those updates regularly I wonder if the problem is caused by those updates I did 2 to 3
months ago so I searched the net and uninstalled update KB2962407 but no use. The source link is below.
http://answers.microsoft.com/en-us/windows/forum/windows_8-windows_update/windows-update-2962407-disables-my-laptop-audio/6aebc3ce-83c9-4015-b089-111ec9a39240
I really can't find any other solution but to seek help here.
A million thanks for reading through my long post!

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic