If you鈥檝e recently upgraded to Windows 11 or performed a clean installation, only to find that your Bluetooth mouse, keyboard, or headphones won鈥檛 connect鈥攐r that the Bluetooth toggle is completely missing from Settings鈥攜ou are not alone. The culprit is often a missing or incompatible driver for the chipset.
This is the most reliable fix for users with pre-built computers. Often, the BCM2045A0 is used in HP or Lenovo desktops. Even if your PC manufacturer hasn't officially updated the driver for Windows 11, the Windows 10 driver usually works perfectly via compatibility mode.
Because it is an older device, Windows 11 often fails to identify it automatically, listing it as an "Unknown Device" or "BCM2045A0" under Other devices in the Device Manager. 馃洜锔� Step 1: Automatic Reinstall (First Fix) bcm2045a0 driver windows 11
is a generic name for a Broadcom Bluetooth 2.0+ EDR chip often found in older laptops (like Dell or ASUS) or USB dongles and VR equipment like the VIVE Forum
Once installed, BCM2045A0 appears as or similar. Bluetooth works 鈥� but sometimes with limited range or sleep/wake issues. Users learn that Windows 11 will occasionally overwrite it with a generic Microsoft driver during updates, breaking it again. They hide the problematic update using wushowhide.diagcab . If you鈥檝e recently upgraded to Windows 11 or
Stick with or 12.0.1.1010 for daily use.
Some BCM2045A0 drivers come only as .sys and .inf files without an installer. Here鈥檚 how to force-install them. Often, the BCM2045A0 is used in HP or Lenovo desktops
Locate the device with the error (often under or Bluetooth ). Right-click it and select Update driver . Choose "Browse my computer for drivers" .