[any ANONYMOUS forum user]

I happen to have the exact same issue with my new Dell PC.
Here are the details:
1) I bought one Dell PC in 2005 (for my wife), and Audacity can see the stereo mixer out and therefore I can capture audio while playing anything in the PC
2) I just bought another one (also a Dell, same performance) for myself to replace an old Athlon, and on this PC, Audacity does not show the "stereo mixer out" option.

My question is: have you ever been able to resolve this issue ? If yes, please share me the info (besides adding another sound card or some kind of external USB audio capture device)