Guys i want to connect my wireless headphone to my windows 7 pc without plugging usb, is there any free hardware to download?

KY-Clay

If your Windows 7 is not bluetooth ready then you will need the hardware. The Bluetooth software is supplied by Windows, as well as by whatever installation disc comes with the Bluetooth hardware. After it’s set up, you’ll most likely use the Bluetooth icon in the notification area to manage various connections and settings. The Bluetooth icon is shown in the margin. The Bluetooth icon in the notification area is the means by which you do most Bluetoothy things in Windows. In Windows 7, you see the Bluetooth hardware listed in the Devices and Printers window. You can use that window, and the Add a Device toolbar button, to browse for and connect Bluetooth gizmos to your computer.

micksmixxx

You can NOT download hardware, my friend. Hardware are physical components.