: Choose Search automatically for drivers . Windows will check its local database and Windows Update for the best matching software.
If your system does not automatically recognize the BT-BU1, follow these steps to manually prompt an installation or update: Automatic Windows Update bt-bu1 driver
Microsoft publishes driver .cab files for Broadcom chips. Search for Microsoft Update Catalog: Broadcom Bluetooth and filter by your hardware ID. : Choose Search automatically for drivers
After conducting a thorough search, I was able to gather some information about the BT-BU1 driver. Here's a report: bt-bu1 driver