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Bluetooth driver - bring a vanished adapter back

When Bluetooth disappears from Windows, the radio itself is almost always fine - the driver stack under it has failed or been replaced. The tricky part is that Bluetooth is usually a function of the Wi-Fi card, hidden behind USB identifiers, so "which driver do I need" is the real question. This guide answers it.

Quick answer

Open Device Manager, select View, then "Show hidden devices", expand Bluetooth, right-click the radio (Intel(R) Wireless Bluetooth, Realtek Bluetooth Adapter or similar), Uninstall device, then restart - Windows rebuilds the stack. If the Bluetooth section is missing entirely, install the Bluetooth driver that matches your Wi-Fi adapter's maker (method 4).

Symptoms - how this problem looks

The Bluetooth toggle is gone from Settings and quick actions
Device Manager shows the radio with Code 43 or Code 10
Headphones or a mouse pair on other devices but not on this PC
Bluetooth vanishes after sleep and returns after a restart
"Add device" finds nothing at all
The Bluetooth section is missing from Device Manager

Why it happens

A Windows update broke the stack

Feature updates sometimes replace the radio driver with an incompatible one; the adapter errors out or disappears.

Bluetooth lives on the Wi-Fi card

On nearly all laptops the Bluetooth radio is part of the wireless card (Intel, Realtek, MediaTek, Qualcomm) - so the right Bluetooth driver is determined by the Wi-Fi card model, not the laptop brand.

Power management switches it off

Windows may power the radio down to save energy and fail to wake it - typical when Bluetooth dies after sleep.

The radio is disabled below Windows

An airplane-mode key, a BIOS/UEFI setting or a hardware switch can turn the radio off - no driver can see a disabled device.

The fixes, in order

1. Quick checks before touching drivers

  1. Make sure Airplane mode is off and Bluetooth is enabled in Settings, then Bluetooth & devices.
  2. Run the troubleshooter: Settings, then System, then Troubleshoot, then Other troubleshooters, then Bluetooth.
  3. Press Win+R, type services.msc, find Bluetooth Support Service - it should be Running with Startup type Manual or Automatic; start it if stopped.

2. Reinstall the radio in Device Manager

  1. Right-click Start, open Device Manager, select View, then Show hidden devices.
  2. Expand Bluetooth, right-click the radio entry and choose Uninstall device (do not tick "remove driver" the first time).
  3. Restart the PC - Windows redetects the radio and rebuilds the stack.
  4. If the radio shows Code 43 again, repeat with "Attempt to remove the driver" ticked, then reinstall the driver with method 4.

3. Stop Windows from powering the radio down

  1. In Device Manager double-click the Bluetooth radio and open the Power Management tab.
  2. Untick "Allow the computer to turn off this device to save power".
  3. Do the same for the USB Root Hub entries under Universal Serial Bus controllers if Bluetooth dies after sleep.

4. Install the right driver package

  1. Identify the wireless card: Device Manager, then Network adapters - the name (for example "Intel(R) Wi-Fi 6 AX201") tells you the maker.
  2. Intel card: download "Intel Wireless Bluetooth driver" from intel.com. Realtek or MediaTek card: get the Bluetooth driver from your laptop maker's support page for your exact model.
  3. USB Bluetooth dongle: install the driver from the dongle maker's page; generic CSR dongles usually work with the inbox driver after a replug.
  4. Install, restart, and pair a device to confirm.

5. If the radio is not listed anywhere

  1. Check for an unknown device under Other devices - a radio without a driver often hides there; installing the package from method 4 claims it.
  2. Reboot into BIOS/UEFI setup and make sure the wireless or Bluetooth option is enabled.
  3. If the adapter appears nowhere and BIOS shows it enabled, the card may have failed - a USB Bluetooth dongle is a quick workaround.

The automatic option

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Frequently asked questions

How do I know which Bluetooth driver my laptop needs?

By the wireless card, not the laptop model: open Device Manager, then Network adapters, and read the Wi-Fi adapter's name. The Bluetooth driver comes from the same maker - Intel cards from Intel, Realtek and MediaTek cards from your laptop vendor's support page.

Bluetooth disappears after every sleep. Is that a driver bug?

Usually power management: Windows turns the radio off and fails to wake it. Untick "Allow the computer to turn off this device" on the radio and the USB hubs (method 3), and update the driver - the combination fixes most cases.

Will any Bluetooth driver work if the brand matches?

No - install the package for your exact card model and Windows version. A near-miss driver may install and still pair unreliably or break after sleep.