Microsoft has just released June’s lot of Windows patches for XP and Vista. Among the latest patches is one to fix a vulnerability in the Bluetooth stack.
If your computer uses Windows XP or Vista and it has Bluetooth then you need this patch. If your computer doesn’t automatically download and install patches you’ll need to go to Internet Explorer, go to the Tools menu and select Windows Update. Until then you should turn off Bluetooth, otherwise someone could take control of your computer.
Bluetooth has always had security problems from the start. There have been a few fixes along the way but overall it’s an insecure technology.
Technical details about this patch here.