I fixed a tricky problem with "Audio Device is disabled" by reducing the security as per this article: http://www.pcgamer.com/the-most-frustrating-windows-7-audio-problem-solved/
To save someone reading the whole article to find the solution it's copied here:
open up a Command Prompt as an administrator (right click the icon in the Start menu, then choose 'Run as Administrator') and type:
net localgroup Administrators /add networkservice
net localgroup Administrators /add localservice
.. but reducing the security to fix audio?!!, that causes me some concern but not enough to bother with other proposed solution of re-installing the operation system.
If anyone has a less drastic solution I'd be interested to read it.
Edited by hamluis, 10 October 2014 - 11:47 AM.
Moved from Win 7 to Tips/Tricks - Hamluis.