First please note that Bluetooth and WiFi are two different technologies that are both wireless communication. While most modern portable devices have WiFi, many do not always have Bluetooth in addition. Please verify that your device does indeed support Bluetooth.
Turn Bluetooth on, on your PC.
1. Open your start menu then go to Settings > Bluetooth & devices and then select "turn on Bluetooth".
Pair your device
1. Turn your device on and verify that it is discoverable. Please refer to your device's documentation on how to make it discoverable as this can vary greatly from device to device.
2. Open your start menu and select Settings > Bluetooth & Devices > Add device > Bluetooth
3. Choose the device you want to pair in the list, follow any additional instructions as they appear. You may be prompted for a PIN or pairing code, your device documentation should provide that information.