Record computer sound not Mic sound

I have Audacity 2.0.5 for windows 7 and I’m using the stereo mix as my input device. Is there a way I can just record what my pc is putting out through the speakers without getting anything off of my mic? Sometimes it picks up me typing or talking and that interferes with what I’m trying to record. What would really be useful is if there were a way to filter which programs it picks up and which it does not so that I can multi-task without having to just do that one recording and nothing else.

You may be able to mute your microphone in Windows Control Panels.

Audacity has Timed Recording. You can tell it when to wake up and start recording and when to stop. Unfortunately only once. You can’t program a whole day. Scroll down to Timer Record.