cmahendra

I had similar problem but i found solution by myself. I had audio card

"REALTEK HIGH DEFINITIoN AUDIO"

First attempt to enabled the display of Disabled or Disconnected devices in CTRLPANEL >> SOUND >> RECORDING area) where you have to right click on blank area and select "SHOW DISBLED DEVICES" and "DISCONNECTED DEVICE"

But even after doing this STEREO MIX was now visible in this area to enable recording. Then I did some googling in many forums and did some workaround with no solution for long time.

Recently I found that I was using Microsoft's builtin driver in VISTA and not from the Manufacturer, but it was working well for everything else. Microsoft's WDM drivers or the drivers we get after ONLINE WINDOWS UPDATE are 99.99% not compatible for this feature.

Then I gave a try and installed XP Driver Downloaded from INTEL website under my Motherboard (D102GGC2) page. Vista driver was not available. AND VOILA,.....the option STEREO MIX have appreared like magic.

You can try this by installing XP/VISTA DRIVER of soundcard which comes on CD with your motherboard or with Integrated SoundCard Chip or download latest one from SoundCard or Motherboard Manufacturer's website. Vista drivers are still under process from most manufacturer's but technically XP-DRIVERS for soundcard work in VISTA without a hitch.

But as I wasted a lot time in this solution, I thought it will be better for internet that I share this to all forums I tried. This is the 5th forum I am registering to share my solution with all you pals.

Hope this helps.