My laptop is ACER Extensa 4420, i got windows 7 on it with 32-bit Operating System. i got a built-in Bluetooth in my laptop but when i switch it ON, it does not show up anywhere in my laptop. i tried to find the bluetooth in device manager but it's not even there. How do i enable the built-in Bluetooth in my laptop? In Vista it was working. Where can i find the correct Blue-tooth driver for windows-7?? Helpppp