To connect a PC & Gaming headset to a computer the cable needs to be connected to the computer's USB or dual 3.5 mm jacks depending on the connection that is available.
Once this connection is achieved go into the computer settings and select the headset as the default playback and default communication device which will put all sound from the computer through the headset. Typically to configure the settings of the computer adjustments are done through the control panel and then through audio devices or sound & audio settings. NOTE: When using soft phone software adjustments to the soft phone settings may also be required.
If the headset is only to be used for communication applications and other computer sounds (like alert tones) need to come through the computer speakers then the configuration is slightly different. The computer speakers need to be selected as the playback device and the headset needs to be selected as the communications device. NOTE: This level of functionality will be determined by the configuration of the computer software/settings.