Okay, I'm getting sick of this. Not only is MS making it impossible to use another BT adapter or any OS other than XP, but now I can't even find out how to obtain the appropriate software, and nothing on their site helps.

The requirements for the wireless optical desktop with Bluetooth is that XP is installed along with service pack 1, plus the XP bluetooth update. I installed SP1 (thanks Rob), and now I am unable to find the slightest hint of the bluetooth update on the MS website. There are slight indications in a few places that the product should have come with this component, but there was zero software included in the box. Not even any instructions.

Any ideas?