Hmm this reminds me, I have the same question I wanted to ask a while ago, I have bluetooth headphones, but I don't know how to connect to my computer, if I can at all.
Bluetooth For Your Computer
To use Bluetooth on your computer, you need to check to see if your computer has Bluetooth hardware installed. If not, you can easily install it by purchasing either a USB-based Bluetooth dongle or a Bluetooth card. Make sure your operating system supports the Bluetooth hardware. Since all operating systems provide different levels of Bluetooth support.
Mines custom built and I know I don't have "Bluetooth Hardware"