How to Turn On Bluetooth on Your Computer

The fastest way to turn on Bluetooth

On Windows, open Settings, select Devices, then Bluetooth & devices, and toggle the switch to On. On Mac, click the Apple menu, go to System Settings, select Bluetooth, and make sure it shows On. Both take about 10 seconds once you know where to look.

If you do not see a Bluetooth option in either place, your computer may not have Bluetooth hardware built in. Older desktops often lack it entirely. A USB Bluetooth adapter (around $10 to $20) adds the capability to any computer with a free USB port.

Key Takeaways

Windows users find the Bluetooth toggle under Settings > Devices > Bluetooth & devices; Mac users find it under System Settings > Bluetooth.
Once Bluetooth is on, your computer becomes visible to other devices and you can pair a mouse, keyboard, headphones, or speaker by selecting it from the available devices list.
If your computer has no Bluetooth option in settings, it lacks the hardware and you will need a USB Bluetooth adapter to use wireless devices.
Pairing happens only once per device; after that, your computer reconnects automatically when the device is nearby and powered on.

Turning on Bluetooth in Windows 10 and 11

Open the Settings app by pressing the Windows key and typing "settings", then pressing Enter. In the left sidebar, click Devices. On the next screen, click Bluetooth & devices at the top of the list.

You will see a toggle switch next to Bluetooth. Click it to turn Bluetooth on. The switch will turn blue and show On. Your computer is now discoverable to other Bluetooth devices for about two minutes, which gives you time to put a wireless mouse or headphones into pairing mode.

If the Bluetooth option does not appear at all, your computer does not have Bluetooth hardware. Check your computer's specifications or contact the manufacturer to confirm. If you need Bluetooth, a USB adapter is the simplest solution.

Turning on Bluetooth on Mac

Click the Apple menu in the top-left corner and select System Settings. In the sidebar, click Bluetooth. You will see the current status at the top of the window. If it says Off, click the toggle or button to turn it on.

Once Bluetooth is on, your Mac will show a list of available devices below the toggle. Any device in pairing mode will appear here. Click the device name to pair it. After pairing, your Mac will reconnect to that device automatically whenever it is nearby and turned on.

What to do if Bluetooth does not appear in settings

If you cannot find a Bluetooth option in Windows Settings or Mac System Settings, your computer lacks built-in Bluetooth hardware. This is common on older desktop computers and some budget laptops. The solution is a USB Bluetooth adapter, a small device that plugs into any available USB port and adds Bluetooth capability.

USB Bluetooth adapters are inexpensive (typically $10 to $25) and work with both Windows and Mac. Plug the adapter into a USB port, install any drivers if Windows prompts you, and then follow the same steps above to turn on Bluetooth. The adapter will appear as a Bluetooth device in your settings.

For laptops, check whether Bluetooth is disabled by a hardware switch or keyboard shortcut before assuming it is missing. Some laptops have a physical switch on the side or a key combination (often Fn + a key with a Bluetooth symbol) that toggles Bluetooth on and off.

Pairing a device after turning Bluetooth on

Once Bluetooth is on, your computer is ready to pair with wireless devices. Put the device you want to connect (a mouse, keyboard, headphones, or speaker) into pairing mode. This usually means holding a button on the device for a few seconds until a light blinks or the device announces it is in pairing mode. Check the device's manual if you are unsure how to enter pairing mode.

On Windows, go back to Settings > Devices > Bluetooth & devices and click Add device. Select Bluetooth from the popup menu. Your computer will search for nearby devices in pairing mode and list them. Click the device you want to pair.

On Mac, the device will appear automatically in the Bluetooth list once it is in pairing mode. Click the device name to pair. Both systems may ask you to confirm the pairing or enter a code shown on the device. Once paired, the device will reconnect on its own whenever it is nearby and powered on.

Troubleshooting Bluetooth that will not turn on

If the Bluetooth toggle is grayed out or will not respond, restart your computer first. This fixes most temporary software glitches. After restart, go back to Settings and try turning Bluetooth on again.

If Bluetooth still will not turn on, check whether a hardware switch or keyboard shortcut has disabled it. On Windows laptops, press Fn and the key with a Bluetooth symbol (usually F2, F3, or another function key). On Mac, check System Settings > Bluetooth again to confirm the toggle is not stuck in the Off position.

If none of these steps work, your Bluetooth hardware may be faulty or the drivers may be corrupted. On Windows, open Device Manager (press Windows key + X and select Device Manager), look for Bluetooth in the list, right-click it, and select Update driver. On Mac, restart in Safe Mode by holding Shift during startup, then restart normally. If the problem persists, contact your computer manufacturer or consider a USB Bluetooth adapter as a workaround.

Keeping Bluetooth on or turning it off to save battery

Bluetooth uses very little power on modern computers, so leaving it on all the time is safe and convenient. Your computer will reconnect to paired devices automatically whenever they are nearby. There is no downside to keeping Bluetooth on.

If you want to turn Bluetooth off to save battery on a laptop, use the same toggle you used to turn it on. On Windows, go to Settings > Devices > Bluetooth & devices and toggle it off. On Mac, go to System Settings > Bluetooth and toggle it off. Turning Bluetooth off will disconnect any wireless devices until you turn it back on.

Frequently Asked Questions

Why does my computer not find my Bluetooth device?

Make sure the device is in pairing mode and within 30 feet of your computer. Check that Bluetooth is turned on in your settings. If the device was previously paired with another computer, it may be trying to reconnect to that one instead. Unpair it from the other computer or turn off Bluetooth on that computer, then try pairing again.

Can I use Bluetooth on a desktop computer without built-in Bluetooth?

Yes. A USB Bluetooth adapter plugs into any USB port and adds Bluetooth capability to any desktop or laptop. These adapters are widely available and cost between $10 and $25. Once plugged in, they work the same way as built-in Bluetooth.

Do I have to pair my device every time I use it?

No. Once you pair a device, your computer remembers it. The next time you turn the device on and it is within range, your computer will reconnect automatically. You only pair once per device.

Will turning on Bluetooth slow down my computer?

No. Bluetooth uses minimal system resources and will not affect your computer's speed or performance, whether it is on or off.

What if my keyboard or mouse keeps disconnecting?

Move the device closer to your computer (within 30 feet). Check that the device has fresh batteries. If the problem continues, unpair the device, restart your computer, and pair it again. Interference from other wireless devices like microwaves or routers can also cause disconnections; try moving your computer away from those devices.

This guide is for general information only and is not medical, financial, legal, or other professional advice. For decisions specific to your situation, consult a qualified professional. See our Editorial Policy.