The technical background is that the dreaded DRM (Digital Rights Management) is built into Vista and requires matching hardware and drivers. If you try to connect any USB sound device manufactured before Vista, i.e. approximately before 2007, like a USB headset (including Bluetooth headsets), Vista will refuse to use it and issue errors like "Device Cannot Start (Code 10)". The device will show in Device Manager with a yellow warning sign.

Microsoft has put up a Knowledge Base article:

Some USB audio devices and some USB audio TV tuners do not work correctly together with a Windows Vista-based computer

The article requires you to call their support to obtain a hotfix. However, some other web sites also carry the hotfix:

http://www.hmsnoodles.com/downloads/Windows6.0-KB933262-v2-x86.msu

http://blog.tmcnet.com/blog/tom-keating/files/Windows6.0-KB933262-v2-x86...

If you find any other source, please add a comment.