I wanted to use Google Voice and Skype and for some unknown reason, my built in Microphone for my Sony laptop was not functioning. According to Windows, no such hardware exist, after much trial and error, I was able to solve the problem.
The reason why ‘no audio devices are installed’ appears in the list for recording tab is because the ‘Show Disabled Device’ is unchecked. All you have to do is check the ‘Show Disabled Device’.
When you’re done, you’ll see that your ‘Microphone’ hardware is disabled, enable it.
This simple troubleshooting tutorial works on all Sony, Dell, Hp, Toshiba and Acer laptop. I believe the user interface is the same for both Windows 7 and Vista. All wells that end well, happy voice chatting on MSN, Google Voice and Skype.