computer does not recognize speaker

[Debba330]

Pavillion dm4-2165dx entertainment PC does not recognize the DKNIGHT SPEAKER THAT I AM TRYING TO CHARGE.

 

[Alabalcho]

That speaker uses USB port for charging only, it does not use it as an USB speaker.
Your PC must have Bluetooth adapter installed, and then you pair the speaker with your PC (in the same way as you would pair it with your phone)