Bluetooth technology is available as a USB Dongle which is plugged into a USB computer port or as a feature available to laptop/netbooks etc. If you posses an USB Dongle, then use the support CD which is found in the box that arrived with your device. Insert the CD and follow the on-screen prompts (a restart is usually recommended). In case you want to install the driver on a laptop, checking for Support page at the developer's website is the indicated thing to do because it will provide all the necessary drivers for your device for different versions of your operating system. Just like in the previous example, download the package and follow its instructions.
