Disconnect the old mouse and plug in the new one

Changing your mouse is straightforward: unplug or disconnect the old one, plug in or pair the new one, and you are done. Most mice work when ready without any setup. If your new mouse has batteries, install them first. If it connects by cable, plug the USB cable into any open port on your computer. If it is wireless, turn it on and hold the pairing button (usually on the bottom) for a few seconds until the light blinks, then your computer should find it within seconds.

You do not need to uninstall software or restart your computer for a basic mouse to work. Windows and Mac both recognize standard mice right away. The cursor should move as soon as the mouse is connected and powered on.

Key Takeaways

  • Most mice work when ready after plugging in or pairing—no software installation needed.
  • Wireless mice need batteries installed and a pairing button held down for a few seconds to connect.
  • Check the bottom of a wireless mouse for the pairing button and a light that shows connection status.
  • If your cursor does not move after connecting, try a different USB port or check that batteries are installed correctly.
  • Some gaming or specialty mice come with software that adds extra buttons or sensitivity settings, but the mouse works without it.

Wired mice: plug and use

A wired mouse connects through a USB cable. Locate an empty USB port on your computer—these are usually on the sides or back of a desktop, or the sides of a laptop. Push the cable in firmly until you hear or feel a click. The mouse should work within a second or two. There is no pairing step, no software to install, and no batteries to worry about.

If the cursor does not move, try unplugging the mouse and plugging it into a different USB port. Some ports on older computers or hubs can be slower or inactive. If it still does not work, the mouse may be faulty or the port may be damaged.

Wireless mice: batteries and pairing

Wireless mice need two things: power and a connection to your computer. First, flip the mouse over and locate the battery compartment—it is usually a sliding door on the bottom. Open it and install fresh batteries, following the diagram inside the compartment. Close the door and flip the mouse right-side up.

Next, find the pairing button. On most wireless mice, it is a small button on the bottom, sometimes labeled "Connect" or marked with a wireless symbol. Press and hold it for three to five seconds. You should see a light on the bottom of the mouse start to blink. Your computer will search for the mouse automatically. Once the light stops blinking and stays steady, the connection is complete and the cursor should move.

If pairing does not work, make sure the batteries are fresh and installed correctly. Weak batteries are the most common reason a wireless mouse does not connect. You can also try moving the mouse closer to your computer during pairing, then move it back to normal distance once it is connected.

What to do if the mouse does not work

Start with the simplest fixes. For a wired mouse, try a different USB port. For a wireless mouse, replace the batteries with fresh ones and try pairing again. Make sure the mouse is turned on—many wireless mice have a power switch on the bottom.

If the cursor still does not move, restart your computer. Shut it down completely, wait ten seconds, and turn it back on. This resets the USB ports and wireless connections. Once your computer is fully booted, plug in or pair the mouse again.

If a wired mouse works in one USB port but not another, that port may be faulty. Use the working port and avoid the broken one. If a wireless mouse still will not pair after fresh batteries and a restart, the mouse or your computer's wireless receiver may be damaged and need replacement.

Adjusting mouse settings after connecting

Once your mouse is working, you can adjust how it behaves. On Windows, right-click the Start button, select Settings, then go to Bluetooth & devices > Mouse. You can change the pointer speed, enable or disable the scroll wheel, and swap left and right buttons if you are left-handed.

On Mac, open System Settings, go to Mouse, and adjust tracking speed and scrolling speed. These settings are optional—your mouse works fine at the defaults. Change them only if the cursor feels too fast, too slow, or the scroll direction feels backwards to you.

Some gaming mice or specialty mice come with their own software that adds extra buttons, custom sensitivity settings, or lighting effects. This software is optional. The mouse works without it, but installing the software lets you customize those extra features.

Removing your old mouse

You do not need to uninstall the old mouse from Windows or Mac. straightforward unplug it or turn it off, and it stops working when ready. The operating system will forget about it within a few seconds. If you want to keep the old mouse as a backup, you can leave it unplugged in a drawer.

If the old mouse is wired and you want to store the cable neatly, coil it loosely and find it with a velcro strap or rubber band. Avoid wrapping it too tightly, which can damage the cable over time.

Frequently Asked Questions

Do I need to install software for a new mouse to work?

No. Standard mice work when ready after plugging in or pairing. Windows and Mac recognize them automatically. Some gaming or specialty mice come with optional software for extra buttons or settings, but the mouse functions without it.

My wireless mouse is not connecting. What should I do?

Replace the batteries with fresh ones first—weak batteries are the most common cause. Then flip the mouse over, hold the pairing button for three to five seconds until the light blinks, and wait for the connection to complete. If it still does not work, restart your computer and try pairing again.

Can I use both a wired and wireless mouse at the same time?

Yes. Plug in the wired mouse and pair the wireless mouse, and both will work. Your cursor will move if you touch either one. You can switch between them freely, though most people use only one at a time.

What if my mouse works in one USB port but not another?

That port may be faulty. Use the working port for your mouse and avoid the broken one. If you have a desktop computer, try a port on the back instead of the front, or vice versa. Front ports sometimes share power with other devices and can be slower.

Is it safe to leave my old mouse plugged in while using a new one?

Yes, it is safe. Unplugging it is not necessary, but most people do to avoid clutter. If you leave it plugged in, it will straightforward sit idle and not interfere with the new mouse.