Typically Bluetooth is used for accessories, not to pair a phone and a PC as bluetooth isn'r really for networking.
I can understand why you would pair bluetooth headphones, a bluetooth keyboard or a mouse to a PC...
I can understand why you would pair a bluetooth speaker, smartwatch, fitness band, car radio system, or other accessory to your phone.
What I don't understand is why you want to pair a phone to a PC as they aren't accessories. What were you hoping to achieve by pairing them?