My Hp Only Has One Mic Input, If I Buy A Usb Sound Card Adapter Will I Be Able To Use Both Inputs At Once ?

I’d like to record two people talking. Is this possible ?
Thanks
An adapter like this

http://www.amazon.com/Daffodil-US01-External-Channel-Microphone/dp/B002FI7GWK/ref=sr_1_8?s=electronics&ie=UTF8&qid=1373345945&sr=1-8&keywords=Mic%2Fspeaker+5.1+Audio+Sound+Card+Adapter