The solution was a form of digital forgery. Users found that by manually editing the inf (setup information) file of a driver intended for a similar, newer device—specifically using the Hardware ID (HWID)—they could trick Windows 10 into accepting the driver. This was not a simple "plug and play" experience. It required diving into Device Manager, selecting "Have Disk," and forcing the OS to accept code it initially rejected.
While this device was originally designed for older operating systems like Windows XP and Vista, you can still find compatible drivers for Windows 10 through various repositories and automated tools: Bcm92035dgrom Driver Windows 10
If you get a "BTHMODEM service failed to start" message, ensure your Windows 10 system services are not disabled. Microsoft Support Hardware ID for your device to ensure we get the exact matching driver? Fix Bluetooth problems in Windows - Microsoft Support The solution was a form of digital forgery
Windows may try to automatically overwrite this driver with its generic USB sibling. To prevent that: Go to System Properties > Hardware > Device Installation Settings → Select No (let me choose what to do). It required diving into Device Manager, selecting "Have
Offers the BCM92035DG driver for Windows 10 64-bit and 32-bit .
Since Broadcom no longer hosts these legacy drivers directly, you can find them through reputable driver repositories:
: Run the built-in tool via Settings > Update & Security > Troubleshoot > Additional troubleshooters > Bluetooth .