You obtain your Bluetooth software/drivers, IF your machine is designed to use Bluetooth from your manufacturer's website if not installed by default.
Connect a Bluetooth device:
https://support.microsoft.com/en-au/help/15290/windows-connect-bluetooth-device
How to Set Up Windows 7 for Bluetooth
http://www.dummies.com/computers/operating-systems/windows-7/how-to-set-up-windows-7-for-bluetooth/
Cheers.