How to Turn On Bluetooth on Your Computer

The quickest way to turn on Bluetooth

On Windows, open the Settings app by pressing Windows key + I, then go to Bluetooth & devices on the left side. You'll see a toggle switch labeled "Bluetooth" at the top — click it to turn it on. On a Mac, click the Apple menu in the top-left corner, select System Settings, then click Bluetooth in the sidebar and make sure it shows "On".

If you don't see a Bluetooth option in Settings, your computer may not have Bluetooth hardware built in. Older desktops especially often lack it. You can check by searching "Device Manager" on Windows and looking under "Bluetooth" — if the category doesn't exist, you'll need a USB Bluetooth adapter (a small dongle that plugs into a USB port).

Key Takeaways

Windows computers turn Bluetooth on through Settings > Bluetooth & devices, while Macs use System Settings > Bluetooth.
Once Bluetooth is on, your computer becomes discoverable and will show nearby devices you can connect to.
If Bluetooth doesn't appear in Settings, your computer lacks the hardware and you'll need a USB adapter.
After pairing a device once, your computer remembers it and reconnects automatically when both are in range.

Finding the Bluetooth toggle on Windows

The Settings app is the main control center for Bluetooth on Windows. Press Windows key + I to open it directly. On the left sidebar, click Bluetooth & devices. At the top of the main panel, you'll see the Bluetooth toggle switch — it will be gray (off) or blue (on).

Click the toggle to turn Bluetooth on. Windows will then search for nearby devices. You may see a notification in the bottom-right corner saying "Bluetooth is on" or showing devices it has found. If you've paired a device before, it may connect automatically within a few seconds.

Some Windows laptops also have a physical Bluetooth button or a keyboard shortcut (often Fn + F3 or similar, depending on the manufacturer). Check your laptop's manual or the function keys for a Bluetooth symbol if you want a faster way to toggle it.

Turning on Bluetooth on a Mac

Click the Apple menu in the top-left corner of your screen and select System Settings. In the sidebar on the left, scroll down and click Bluetooth. You'll see the Bluetooth status in the main panel — if it says "Off", click the toggle or button to turn it on.

Once Bluetooth is on, your Mac will show a list of nearby devices you can connect to. If you've paired a device before, it will appear in the list with a "Connected" label if it's in range and powered on. Macs remember paired devices and reconnect to them automatically, so you usually only need to turn Bluetooth on once.

What to do if Bluetooth doesn't show up in Settings

If you can't find a Bluetooth option in Settings on either Windows or Mac, your computer doesn't have Bluetooth hardware. This is common on older desktop computers and some budget models. The solution is a USB Bluetooth adapter, a small device (usually the size of a thumb drive) that you plug into any available USB port.

Once you plug in the adapter, Windows or Mac will recognize it automatically. You may see a notification asking you to install drivers — follow the on-screen instructions. After that, Bluetooth will appear in Settings and work the same way as built-in Bluetooth. Most adapters cost between $10 and $30 and work with any computer that has a USB port.

Pairing a device after turning Bluetooth on

Once Bluetooth is on, your computer becomes discoverable, meaning nearby devices can find it. On your phone, headphones, or other device, go to its Bluetooth settings and look for your computer's name in the list of available devices. Select your computer's name to start pairing.

Your computer may show a prompt asking you to confirm the pairing — click "Yes" or "Pair" to complete it. Some devices ask for a PIN code, which is usually 0000 or 1234, but most modern devices pair without one. After pairing succeeds, your device will connect automatically whenever both are turned on and in range.

Troubleshooting when Bluetooth won't turn on

If the Bluetooth toggle is grayed out or won't respond, restart your computer first — this fixes most temporary glitches. After restarting, go back to Settings and try turning Bluetooth on again.

If it's still not working, check whether Bluetooth is disabled in your BIOS (the firmware that runs before Windows starts). This is rare but happens on some corporate or heavily locked-down computers. You'll need to restart your computer and press a specific key during startup (usually F2, F10, or Delete, depending on your computer's manufacturer) to enter BIOS settings. Look for an option labeled "Integrated Bluetooth" or "Onboard Bluetooth" and make sure it's enabled. If you're not comfortable doing this, a technician can help.

On a Mac, if Bluetooth won't turn on, try resetting the Bluetooth module by holding Shift + Option and clicking the Bluetooth icon in the menu bar (top-right corner), then selecting "Reset the Bluetooth module". Restart your Mac afterward.

Keeping Bluetooth on or turning it off to save battery

Bluetooth uses a small amount of power, so leaving it on all the time will slightly reduce your laptop's battery life — usually by 5 to 10 percent depending on how often it's actively connecting. If you use Bluetooth devices regularly, it's fine to leave it on. If you only use them occasionally, turning Bluetooth off when you're not using it will extend your battery.

On Windows, you can also manage Bluetooth power settings by going to Settings > Bluetooth & devices > Device properties and looking for power-saving options for individual devices. On a Mac, Bluetooth automatically enters a low-power state when no devices are connected, so you don't need to manually adjust it.

Frequently Asked Questions

Why does my computer show Bluetooth is on but won't connect to my device?

Make sure your device is in pairing mode and within 30 feet of your computer. If you've paired before, try "forgetting" the device in your computer's Bluetooth settings and pairing again. Restart both your computer and the device if the connection still fails.

Can I use Bluetooth on a desktop computer?

Only if it has built-in Bluetooth or you add a USB adapter. Most desktops don't come with Bluetooth, but a USB adapter solves this for about $15 to $30 and works when ready after plugging in.

Will turning Bluetooth on make my computer slower?

No. Bluetooth runs on its own hardware and doesn't affect your computer's speed or performance. It only uses a small amount of power, which is why it may slightly reduce battery life on laptops.

What if my computer pairs with the wrong device?

Go to Bluetooth settings and look for the device name, then select "Remove" or "Forget". After that, turn Bluetooth off and back on, then pair with the correct device. Your computer will remember the new pairing.

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.