Page Purpose
This page provides instructions for resolving problems where Bluetooth does not work on a Windows computer. These instructions apply to computers with built-in Bluetooth adapters and external USB Bluetooth adapters.
Symptoms
Bluetooth may not work due to one or more of the following:
- Bluetooth toggle missing from Windows settings
- Bluetooth cannot be turned on
- Bluetooth devices do not appear during scanning
- Bluetooth devices fail to pair or disconnect frequently
- Bluetooth icon missing from taskbar
- Bluetooth adapter not detected in Device Manager
- Bluetooth audio devices connect but produce no sound
- Bluetooth mouse or keyboard not responding
Root Cause (Plain Language)
Bluetooth requires functioning hardware, proper drivers, enabled services, correct settings, and a working radio signal. When any of these components fail, Bluetooth stops working or cannot connect to devices.
Bluetooth problems occur due to one of the issues listed below.
This guide addresses both software-related Bluetooth failures and connection issues.
Step-by-Step Instructions
Step 1: Check Airplane Mode
Airplane mode disables all wireless communication including Bluetooth.
- Open Settings.
- Select Network & Internet.
- Turn Airplane Mode off.
If Bluetooth works normally, proceed to Verification Steps. If the issue continues, proceed to Step 2.
Step 2: Check Physical Bluetooth Switch
Some laptops have physical switches or keyboard shortcuts to enable or disable wireless radios.
For Laptops:
- Look for a wireless switch on the sides or front of the laptop.
- Ensure the switch is set to On.
- If your laptop uses a function key, press Fn plus the wireless/Bluetooth key.
For Desktop Computers:
- Most desktops do not have physical wireless switches.
External USB Bluetooth adapters do not have physical switches. Proceed to Step 3.
If Bluetooth works normally, proceed to Verification Steps. If the issue continues, proceed to Step 3.
Step 3: Turn On Bluetooth in Windows Settings
- Open Settings.
- Select Bluetooth & Devices.
- Turn Bluetooth on.
If Bluetooth toggle is missing or grayed out:
Bluetooth adapter is not detected by Windows. Proceed to Step 4.
If Bluetooth works normally, proceed to Verification Steps. If the issue continues, proceed to Step 4.
Step 4: Restart Computer
Restarting clears temporary system issues.
- Click Start.
- Select Restart.
If Bluetooth works normally, proceed to Verification Steps. If the issue continues, proceed to Step 5.
Step 5: Check Device Manager for Bluetooth Adapter
- Right-click Start.
- Select Device Manager.
- Expand Bluetooth.
If yellow triangle appears next to Bluetooth adapter:
Driver or hardware issue. Proceed to Step 6.
If adapter shows with down arrow icon (disabled):
- Right-click the adapter.
- Select Enable Device.
If Bluetooth adapter does not appear at all:
Windows cannot detect the hardware. Proceed to Step 7.
If Bluetooth works normally, proceed to Verification Steps. If the issue continues, proceed to Step 6.
Step 6: Update Bluetooth Drivers
Method 1: Update from Device Manager
- Right-click the Bluetooth adapter in Device Manager.
- Select Update Driver.
- Choose Search automatically for drivers.
Method 2: Update from Manufacturer Website
- Visit the computer or adapter manufacturer’s support website.
- Download the latest Bluetooth driver for your model.
- Install the driver and restart the computer.
If Bluetooth works normally, proceed to Verification Steps. If the issue continues, proceed to Step 7.
Step 7: Uninstall and Reinstall Bluetooth Adapter
WARNING: This removes the Bluetooth adapter from Windows. Paired devices will be removed but can be re-paired.
- Open Device Manager.
- Right-click the Bluetooth adapter.
- Select Uninstall Device.
- Restart the computer.
Windows will reinstall the adapter automatically.
If Bluetooth works normally, proceed to Verification Steps. If the issue continues, proceed to Step 8.
Step 8: Restart Bluetooth Services
Bluetooth requires specific Windows services to run.
- Press Windows + R.
- Type services.msc and press Enter.
- Locate Bluetooth Support Service.
- Right-click the service and select Restart.
- Open the service properties and set Startup type to Automatic.
If Bluetooth works normally, proceed to Verification Steps. If the issue continues, proceed to Step 9.
Step 9: Disable Bluetooth Power Management
Windows may turn off Bluetooth to save power.
- Open Device Manager.
- Right-click the Bluetooth adapter and select Properties.
- Go to the Power Management tab.
- Uncheck Allow the computer to turn off this device to save power.
- Click OK.
If Bluetooth works normally, proceed to Verification Steps. If the issue continues, proceed to Step 10.
Step 10: Run Bluetooth Troubleshooter
Windows 10:
- Open Settings.
- Select Update & Security.
- Select Troubleshoot > Additional troubleshooters.
- Select Bluetooth and click Run the troubleshooter.
Windows 11:
- Open Settings.
- Select System.
- Select Troubleshoot > Other troubleshooters.
- Find Bluetooth and click Run.
If Bluetooth works normally, proceed to Verification Steps. If the issue continues, proceed to Step 11.
Step 11: Check for Windows Updates
- Open Settings.
- Select Windows Update.
- Click Check for updates.
- Install all available updates.
- Restart the computer.
If Bluetooth works normally, proceed to Verification Steps. If the issue continues, proceed to Step 12.
Step 12: Test External USB Bluetooth Adapter
Only for computers with external USB Bluetooth adapters:
- Unplug the Bluetooth adapter.
- Plug it into a different USB port.
- Avoid using USB hubs; connect directly to the computer.
- If possible, test the adapter on another computer.
For built-in Bluetooth adapters:
Proceed to Step 13.
If Bluetooth works normally, proceed to Verification Steps. If the issue continues, proceed to Step 13.
Step 13: Check BIOS Wireless Settings
WARNING: Incorrect BIOS settings can prevent the computer from starting. Only change settings you understand.
- Restart the computer.
- Enter BIOS/UEFI setup (common keys: F2, F10, Delete).
- Locate Wireless, Bluetooth, or Internal Device settings.
- Ensure Bluetooth is set to Enabled.
- Save changes and exit BIOS/UEFI.
If Bluetooth works normally, proceed to Verification Steps. If the issue continues, see If the Issue Persists.
Verification Steps
After Bluetooth works normally:
- Pair a Bluetooth device such as a mouse, keyboard, or headset.
- Restart the computer.
- Confirm Bluetooth remains enabled after restart.
- Confirm the paired device reconnects and functions correctly.
If Bluetooth consistently works after restart, the issue is resolved.
If the Issue Persists
If Bluetooth still does not work after completing all steps:
Possible Hardware Failure
The Bluetooth adapter or related hardware may be defective.
Next Steps
- Contact the computer manufacturer or a qualified technician for diagnostics.
- Use an external USB Bluetooth adapter as a workaround if built-in Bluetooth has failed.
For Laptops with Replaceable Wireless Cards
Some laptops use replaceable M.2 or mini-PCIe wireless cards that include Bluetooth. These cards can be replaced if defective. Replacement requires technical knowledge and proper tools.
External USB Bluetooth Adapter Considerations
If an external USB Bluetooth adapter works but built-in Bluetooth does not, the internal adapter or its connection may have failed.
Legal and Safety Notes
No Data Loss Risk
These procedures do not affect personal files or data. Bluetooth settings and paired devices may be removed and need to be reconfigured, but files are not deleted.
No Warranty
These instructions are provided for informational purposes. Following these steps is at your own risk. No guarantee is made that these steps will resolve your specific issue.
When to Stop
If you encounter error messages not described in this guide, or if you are uncertain about any step, stop and seek assistance.
