If Bluetooth worked previously, you could activate a Windows restore point for a date before Bluetooth stopped working. Some corrupted system files on the computer prevent the Bluetooth adapter from being enabled and working correctly.If the options above do not work, see other causes below with their fix. If the computer detects the Bluetooth adapter, it should automatically be reinstalled.Reinstall the Bluetooth adapter card in the computer.Verify in the Device Manager the Bluetooth adapter is not listed.Open the computer case and remove the Bluetooth adapter card from the computer.If the Bluetooth adapter in the computer can be removed (not an integrated adapter), try the steps below. Try to enable the Bluetooth adapter if it's not already enabled.Check in the Device Manager to verify the Bluetooth adapter was reinstalled.If the computer detects the Bluetooth adapter, it should automatically reinstall it.In the Device Manager, right-click the Bluetooth adapter and select Uninstall.Try to enable the Bluetooth adapter in the Device Manager.How to install and update a computer driver.Download and install the latest drivers.Visit the laptop or Bluetooth adapter manufacturer website for the latest drivers for the Bluetooth adapter in your computer.

Install latest drivers for the Bluetooth adapter If the Bluetooth adapter is disabled in the Device Manager and the Enable option shown above does not work, try the following options. If you want to disable Bluetooth, in step 3 above, select the Disable option in the pop-up menu.

If the Enable option is not available in the pop-up menu, and instead you see the Disable option, it means Bluetooth is already enabled.

No bluetooth in device manager