Not knowing what connections you have on the TV or HTS I would say that if you already have the HTS connected to the TV and you get sound from the TV to the HTS then you just need to connect the laptop to the TV with HDMI. Make sure your set the audio to output over HDMI from the laptop.
Not knowing what connections you have on the TV or HTS I would say that if you already have the HTS connected to the TV and you get sound from the TV to the HTS then you just need to connect the laptop to the TV with HDMI. Make sure your set the audio to output over HDMI from the laptop.