* Just have a look in device manager. If you have any exclamation or question mark for unknown devices, you can just update the driver via online.
* Sometimes, you may get audio problems while using the microphone, However, you will be able to hear windows sounds, music and other audios. To make your microphone work, you will have to update the drivers.
* Otherwise, you can just go ahead and use drivers that were installed by Windows 7.
Hope this helps