bbcme

I have used WavePad for several year now and have recently installed it on my new lap top. However when setting it up I have discovered that I don't seem to have a Stereo Mix option on my recording properties. The only options that are there are Line In and Microphone. I have tried these options and can't record any audio played on the lap top (e.g. Live Streams etc.) Does anyone know how I can select the Stereo Mix or any other way that will allow me to record. Cheers