Do not remove every paired device first. If the Bluetooth toggle and adapter are both missing, pairing records are not the first problem.

Use the computer, motherboard, or adapter manufacturer’s support page for driver and BIOS downloads.

Decide What Is Missing#

SymptomCheck first
Bluetooth toggle is missingDevice Manager and Bluetooth service
Toggle exists but device will not connectPairing mode, battery, saved pairing
Audio device connects with no soundWindows audio output
Bluetooth vanishes after sleepDriver, power management, BIOS
Adapter has an error codeDevice properties and manufacturer driver

Open Settings > Bluetooth & devices and Device Manager before changing anything.

Open the Get Help app and run the Bluetooth troubleshooter. Continue below when the adapter or toggle remains missing.

Restore the Adapter#

  1. Restart Windows fully.
  2. Open Device Manager.
  3. Select View > Show hidden devices.
  4. Expand Bluetooth, Network adapters, and USB controllers.
  5. Enable the adapter only when Device Manager explicitly marks the current device as disabled. A gray hidden entry may be an old, disconnected device rather than the active adapter.
  6. Open its properties and record any error code.
  7. Select Action > Scan for hardware changes.

Many Wi-Fi cards contain both Wi-Fi and Bluetooth. If both disappear, check the combined wireless driver, BIOS setting, or physical card connection.

Restart Bluetooth Support Service#

  1. Press Windows + R.
  2. Enter services.msc.
  3. Find Bluetooth Support Service.
  4. Start or restart it.

If the service will not start, record the error rather than changing unrelated services.

Roll Back or Install the Correct Driver#

If the adapter disappeared immediately after an update:

  1. Open the adapter’s Properties > Driver tab.
  2. Use Roll Back Driver if available.
  3. Restart and test the toggle.
  4. If rollback fails, install the latest approved Bluetooth or wireless package from the computer manufacturer.
  5. Consider chipset or BIOS updates only when the exact model’s release notes mention Bluetooth, wireless, USB, sleep, or the installed Windows build.

Create a restore point before changing Windows drivers, and connect the computer to power before a BIOS update. A Windows restore point does not roll back BIOS or UEFI firmware. Do not interrupt the firmware update.

Reset the Device’s Pairing Only When the Adapter Exists#

If Windows sees Bluetooth but one accessory fails:

  1. Charge the accessory.
  2. Remove it from Bluetooth & devices.
  3. Clear its old pairing according to the manufacturer’s instructions.
  4. Put it into pairing mode.
  5. Add it again.

Test the accessory with another phone or computer. If it fails everywhere, the accessory is the likely cause.

Check Sleep and USB Power#

For Bluetooth that disappears after sleep, update the system firmware and wireless driver first. On systems that expose the option, open the adapter or related USB hub properties and inspect power management. Change one setting at a time and test a full sleep-and-wake cycle.

Avoid disabling power management across every USB controller. That can increase power use and hide the actual device involved.

Test the Accessory After Restart and Sleep#

  1. Confirm the Bluetooth toggle remains visible.
  2. Pair one known-good device.
  3. Restart Windows.
  4. Put the computer to sleep and wake it.
  5. For headphones, play audio. For a mouse or keyboard, confirm input. For a phone, complete a small permitted file transfer rather than relying on the Connected label.