I am having the exact same problem with Bluetooth after installing SP2 for Vista. I used to sync my phone (Treo) regularly and all of a sudden the same two functions are not working under Device Manager: Microsoft Bluetooth Enumerator and Bluetooth Device (RFCOMM Protocol TDI) #2. Does Microsoft know its SP2 update is doing this?? Does anyone know a good Microsoft forum/board to post to, or how to contact the company?? At least I know I'm not alone!! Thanks, Brian