This is a generic issue with all Windows OS updates....many of the users are facing this issue....this issue began after an auto update from MS changed many IRQs of Win OS, mainly the Sound and Audio Control system of Windows.
1 - R U facing NO Audio / No Sound issue...?
2 - Is ur Volume Control not responding ?
3 - Is ur Sound and Audio Device in Control Panel Grayed out ?
4 - Do u get a msg "No Active Mixer Devices Installed....when u try to open Volume Ctrl etc etc ?

If ur ans to any one of them is Yes...then u are being spammed by Microsoft....as ur Sound Control IRQ is being frozen by a recent update from Microsoft....
NOTE..THIS…IS…VERY..IMPORTANT...
No file update or any sound driver update can fix it, neither Microsoft is issuing any patch to fix it…or giving any help on this.
Full solution is available in my website (Support page)...it's quite simple process to fix it, and I am not charging any money, just doing FREE service to help everyone affected by this stupidity from Microsoft.
www.sureshayyar.110mb.com
visit my Support Page.
many of us are victim of this “stupid” update, my office has 24 PC/Notebooks and almost all of them got this issue one by one in 4 months time period, I head the tech dept here.
all the best...
Kindly leave a feedback/rating to this solution as it will help me understand if my solution worked