Skype and Headset

Do you mean that you want the sound to go through your sound card, but want Skype to use your mic to talk, or am I totally misunderstanding?

1)right click on the volume v >

2)there should be something in the lines 'recording/reproduction device' (my windows is not in english, sorry)

3)put your headset as default

PS: if you don't have the option 2 try updating audio driver or downloading one

My sound card software has an option to mute speakers when headphones are plugged in, maybe check yours to see if it does.

Go into Skype's sound options. It runs its own sound independently of your OS under most circumstances.

My Skype sound settings

Note how it says my headset? I can set that to my headset mic or my laptop's mic and headset speakers, laptop speakers, or my TV's speakers (HDMI volume control), respectively.

Alternatively, go to Sound through control panel and set headset as default communication device. Skype will then route automatically to headset instead of speakers.