In Windows 7, drivers are the most common hurdle. If the Device Manager shows a yellow warning triangle next to your Bluetooth device (often labeled as an "Unknown Device"), you need to update the driver.
Follow this guide to identify your hardware and install the necessary software. how to install bluetooth on windows 7
If the hardware is present but not working, you likely need a driver. In Windows 7, drivers are the most common hurdle
Do you already have a , or are you checking for built-in hardware? What brand/model is your computer? In Windows 7
Look for a section named or Network adapters .