I’m frustrated

How to connect a Numark TTUSB turntable to my HP Pavilion g4 computer. No sound. Using Windows 7 OS

I have a Numark TTUSB turntable. I am trying to connect it to a HP Pavilion g4 computer using a Windows 7 operating system. I can't seem to generate any sound. Can someone help me with this task step by step? Thank you.

Screenshot of sound window below:

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