You can use a type of cable called an auxiliary cable to connect your laptop computer to your Denon home audio receiver. This will allow you to listen to the audio from your laptop computer not through its speakers, but through the speakers that are connected to your home audio system. Most laptop computers don't have sound card inputs the same way a desktop would, but that's OK: Just use your headphone jack to connect the cable to both devices.
Locate the auxiliary input on your Denon receiver. This input will be on the back of the receiver and will have either "Auxiliary" or "AUX" written above or below it.
Plug your auxiliary cable into your laptop computer's headphone jack.
Plug your auxiliary cable into your Denon receiver's auxiliary input that you located in "Step 1."
Turn on your laptop. Turn on your Denon receiver.
Press "Input" on your Denon receiver until it is switched to the auxiliary input. All laptop sounds will now be heard over your Denon receiver's connected speakers.