Hello taikuanwai,
The driver that you are looking for will be provided by your system manufacturer.
Regards.
Victor from Intel: Your support sucks.
taikuanwai: If you do not have a suitable driver provided by your system manufacturer (e.g. unsupported OS), the bluetooth driver can be found at the bottom of the wireless drivers if you use the download center categories search, or here: http://downloadcenter.intel.com/Detail_Desc.aspx?agr=Y&ProdId=3507&DwnldID=21713&ProductFamily=Wireless+Networking&ProductLine=Intel%c2%ae+Centrino%c2%ae+Wi-Fi+Products&ProductProduct=Intel%c2%ae+Centrino%c2%ae+Wireless-N+2230&lang=eng
