: Roll back or hide the problematic update.
If Windows 11 cannot recognize it, you will typically see it listed under in Device Manager as "BCM2045A0" or "Unknown Device" , often accompanied by a yellow exclamation mark.
You can manually force Windows to search its local catalog for a generic Bluetooth driver. Right-click the and choose Device Manager .
To avoid losing Bluetooth after every Windows update:
Select (or generic Microsoft) as the manufacturer, choose a standard Bluetooth driver, and click Next to install. Method 3: Download the Manufacturer Driver bcm2045a0 driver windows 11
While Broadcom doesn't offer direct consumer downloads for this old chip, PC manufacturers still host the packages: BCM2045A0 Drive is unavailable - VIVE Forum
Turn off your computer, unplug the power cable (and remove the battery if possible), wait 30 seconds, and turn it back on. This resets the Bluetooth hardware.
Check and select Windows 8 or Windows 7 . Check Run this program as an administrator . Click Apply and run the installer. Method 4: Find Drivers Using Hardware IDs
If Bluetooth was previously working and has recently stopped, you can try rolling back the driver. : Roll back or hide the problematic update
Resolving this issue requires a systematic approach. Start with the simplest method and work your way down. The most effective solution is often the second step.
Related search suggestions: I'll provide a few related search terms to help you find the right download.
Here are several useful resources to help resolve BCM2045A0 driver issues:
In the list, find or Bluetooth Radio . If prompted to select a manufacturer, choose Broadcom (if available) or Microsoft . Right-click the and choose Device Manager
How to Install and Fix the BCM2045A0 Driver on Windows 11 If you recently upgraded to Windows 11 or plugged in a legacy device, you might notice a mysterious entry labeled listed under Other Devices with a yellow exclamation mark in your Device Manager. This error indicates that your system recognizes the hardware but lacks the proper controller software to interact with it.
The BCM2045A0 is a common Bluetooth chipset used in many laptops (Dell, HP, Lenovo) and pre-built PCs. Because Windows 11 handles drivers differently than Windows 10, the automatic updates often fail to detect or install the correct version for this older chip.
, you might have noticed a mysterious "BCM2045A0" listed under Other Devices with a yellow warning icon. This is a Broadcom Bluetooth