I cannot find Bluetooth driver for Asus Ultrabook 551L to activate in windows 11

Sinchai | TA (Trainocate) 0 Reputation points
2026-09-13T12:49:16.2066667+00:00

Hello, I am encountering an issue where Bluetooth is not working on my Asus Sonic Master Ultrabook (model 551LN) running Windows 11 Pro (version 25H 10.0.26200 B. 26200). I tried installing the drivers downloaded from the official Asus website, but it still does not work; however, it used to function normally on version 24H. I would appreciate any advice or suggestions from those with experience in this matter. User's image

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Windows for home | Windows 11 | Devices and drivers
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  1. AI answer

    2026-09-13T12:49:41.4+00:00

    Since Bluetooth worked on 24H and stopped after moving to Windows 11 25H, the most supported fixes are driver rollback, reinstall, Windows Update, and a manual reinstall from the PC manufacturer.

    1. Run the Bluetooth troubleshooter
      • In Windows 11, go to Start > Settings > System > Troubleshoot > Other troubleshooters.
      • Next to Bluetooth, select Run.
    2. Update the Bluetooth driver in Device Manager
      • Open Start, type Device Manager, and open it.
      • Expand Bluetooth.
      • Right-click the Bluetooth adapter and select Update driver.
      • Select Search automatically for drivers.
      • Restart the PC after the update.
    3. Check Windows Update
      • Go to Start > Settings > Windows Update.
      • Select Check for updates.
      • Install all available updates, then restart.
    4. Roll back the Bluetooth driver
      • This is especially relevant because the issue started after a newer Windows version.
      • In Device Manager, expand Bluetooth.
      • Right-click the Bluetooth adapter > Properties.
      • Open the Driver tab.
      • Select Roll Back Driver if the button is available.
      • Follow the prompts.
    5. Uninstall and reinstall the Bluetooth driver
      • In Device Manager, expand Bluetooth.
      • Right-click the Bluetooth adapter and select Uninstall device.
      • Restart the PC.
      • Windows should reinstall the driver automatically after restart.
    6. Manually reinstall the ASUS Bluetooth driver
      • Go to the ASUS support page for the exact model.
      • Download the latest Bluetooth driver.
      • If ASUS provides an .exe installer, run it and complete setup.
      • If ASUS provides extracted driver files, in Device Manager select the Bluetooth adapter > Update driver > Browse my computer for drivers, then point to the folder containing the driver files.
      • Restart after installation.
    7. If Windows says the best driver is already installed
      • That does not rule out a newer or better-matched driver from the PC manufacturer.
      • Use the ASUS package for the exact device model and restart after installation.

    If Bluetooth is missing entirely in Device Manager, check under Other devices for unknown hardware. If the adapter is present but unstable after reinstalling and rollback is unavailable or ineffective, the remaining supported path is to keep using the manufacturer driver rather than the generic Windows one.

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  2. Thomas4-N 21,570 Reputation points Microsoft External Staff Moderator
    2026-09-14T09:54:27.0966667+00:00

    Hello Sinchai | TA (Trainocate),

    Before looking for a Bluetooth driver, could you check what Bluetooth device Windows is actually detecting?

    In Device Manager, do you see:

    • A Bluetooth section
    • An Unknown device
    • A device with a yellow warning icon under Other devices

    If so, please open the device's Properties > Details tab and post the Hardware Ids value.

    The ASUS 551LN was sold with different wireless/Bluetooth adapters depending on configuration, so the correct driver cannot be identified from the laptop model alone.

    Also, since you mentioned Bluetooth worked on Windows 11 24H and stopped after moving to Windows 11 25H, please confirm the exact Windows build you are currently running (Settings > System > About).

    With the Hardware IDs, we can determine the Bluetooth chipset and check whether a compatible driver is available.

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