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HP Recommended
Microsoft Windows 11
My Bluetooth adapter randomly disappears from Windows Device Manager and shows Code 45. Alongside this, an Unknown USB Device frequently appears with Code 43 (Device Descriptor Request Failed). I've tried every thing- turned off power saving, power management, reinstalled the driver, reinstalled windows, power off and on. It just works when I power off the laptop and then press the power button for 30 seconds and then turn it back on. Otherwise the bluetooth stays disappeared and even when it appears it just works for 5 mins before disappearing again
1 REPLY 1
HP Recommended

Hi @Vickrant, welcome to the HP Support Community.

 

Bluetooth disappearing with Code 45, and an Unknown USB Device with Code 43, usually means Windows is losing the Wi-Fi and Bluetooth module itself, rather than only the driver.

 

Please try these steps:

 

1. Open Device Manager, click View, then select Show hidden devices, and look for the Bluetooth adapter and for the Unknown USB Device.

 

2. Install the latest Bluetooth and Wi-Fi drivers and the latest BIOS from here: https://support.hp.com/us-en/drivers

 

3. Run the HP PC Hardware Diagnostics by pressing F2 at start-up, and test the wireless module.

 

4. Check whether your Wi-Fi also drops at the same time as Bluetooth, as that would confirm the module is the common cause.

 

Could you tell me the exact HP laptop model, and whether Bluetooth still disappears when you use an external USB Bluetooth adapter?


I am proudly Mexican, a Computer Systems Engineer and an HP Community volunteer (not an HP employee).
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