Bluetooth is for short range wireless devices which are Bluetooth compatible & enabled. Desktop computers & desktop gaming computers do not usually come with BLUETOOTH as standard.
For Bluetooth capabilties a desktop PC would require Bluetooth dongle inserted into a USB port. (as above)
To enable Bluetooth go to your System Tray and click on the UP ARROW to reveal the hidden icons (above picture)
Click on the Bluetooth Icon as above.
Click on the ADD A BLUETOOTH DEVICE as above.
In this dialog box Windows 10 will search for any compatible Bluetooth devices in your area and will allow you to connect to them.