I have a new Dell laptop with Intel HD graphics and an integrated TV tuner.
How can I use this TV tuner? Should I install third party software for using it or just configure something? I tried to google it but couldn't find anything.
This is very simple!
Open Dell's offical site: dell.com
Go to the Drivers/Downloads page (you can find it on the site footer)
Enter the details of your model, or you can type in your service tag (found on the underneath of your laptop)
When the model is chosen, pick the operating system used and submit search.
In the list of available drivers/software, toggle "Video", and you will see "AverMedia" or something similar; this is your TV Tuner's driver/software.